diff options
| author | Linus Torvalds | 2014-08-04 18:51:19 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2014-08-04 18:51:19 -0700 |
| commit | 79eb238c76782a59d51adf8a3dd7f6444245b475 (patch) | |
| tree | 73bd8c89a1ef19ec01a7592f189bbc0f52847185 /drivers | |
| parent | 53ee983378ff23e8f3ff95ecf99dea7c6c221900 (diff) | |
| parent | 5a64096700dc9761b57e767c9f0b740eb2cb84dd (diff) | |
Merge tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty / serial driver update from Greg KH:
"Here's the big tty / serial driver update for 3.17-rc1.
Nothing major, just a number of fixes and new features for different
serial drivers, and some more tty core fixes and documentation of the
tty locks.
All of these have been in linux-next for a while"
* tag 'tty-3.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (82 commits)
tty/n_gsm.c: fix a memory leak in gsmld_open
pch_uart: don't hardcode PCI slot to get DMA device
tty: n_gsm, use setup_timer
Revert "ARC: [arcfpga] stdout-path now suffices for earlycon/console"
serial: sc16is7xx: Correct initialization of s->clk
serial: 8250_dw: Add support for deferred probing
serial: 8250_dw: Add optional reset control support
serial: st-asc: Fix overflow in baudrate calculation
serial: st-asc: Don't call BUG in asc_console_setup()
tty: serial: msm: Make of_device_id array const
tty/n_gsm.c: get gsm->num after gsm_activate_mux
serial/core: Fix too big allocation for attribute member
drivers/tty/serial: use correct type for dma_map/unmap
serial: altera_jtaguart: Fix putchar function passed to uart_console_write()
serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers
Serial: allow port drivers to have a default attribute group
tty: kgdb_nmi: Automatically manage tty enable
serial: altera_jtaguart: Adpot uart_console_write()
serial: samsung: improve code clarity by defining a variable
serial: samsung: correct the case and default order in switch
...
Diffstat (limited to 'drivers')
70 files changed, 1403 insertions, 912 deletions
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 8320abd1ef14..0ea9986059af 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2347,8 +2347,6 @@ static void mgslpc_close(struct tty_struct *tty, struct file * filp) printk("%s(%d):mgslpc_close(%s) entry, count=%d\n", __FILE__, __LINE__, info->device_name, port->count); - WARN_ON(!port->count); - if (tty_port_close_start(port, tty, filp) == 0) goto cleanup; @@ -2510,7 +2508,7 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp) __FILE__, __LINE__, tty->driver->name, port->count); /* If port is closing, signal caller to try again */ - if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){ + if (port->flags & ASYNC_CLOSING){ wait_event_interruptible_tty(tty, port->close_wait, !(port->flags & ASYNC_CLOSING)); retval = ((port->flags & ASYNC_HUP_NOTIFY) ? diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index a57bb5ab761c..fd66f57390d0 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -1579,7 +1579,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp) /* * If the port is the middle of closing, bail out now */ - if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { + if (info->port.flags & ASYNC_CLOSING) { wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c index 17ee3bf0926b..345cebb07ae7 100644 --- a/drivers/tty/ipwireless/tty.c +++ b/drivers/tty/ipwireless/tty.c @@ -93,11 +93,6 @@ static int ipw_open(struct tty_struct *linux_tty, struct file *filp) return -ENODEV; mutex_lock(&tty->ipw_tty_mutex); - - if (tty->closing) { - mutex_unlock(&tty->ipw_tty_mutex); - return -ENODEV; - } if (tty->port.count == 0) tty->tx_bytes_queued = 0; diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 2ebe47b78a3e..152443ab1447 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2088,9 +2088,7 @@ static int gsm_activate_mux(struct gsm_mux *gsm) struct gsm_dlci *dlci; int i = 0; - init_timer(&gsm->t2_timer); - gsm->t2_timer.function = gsm_control_retransmit; - gsm->t2_timer.data = (unsigned long)gsm; + setup_timer(&gsm->t2_timer, gsm_control_retransmit, (unsigned long)gsm); init_waitqueue_head(&gsm->event); spin_lock_init(&gsm->control_lock); spin_lock_init(&gsm->tx_lock); @@ -2230,8 +2228,7 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len) static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) { - int ret, i; - int base = gsm->num << 6; /* Base for this MUX */ + int ret, i, base; gsm->tty = tty_kref_get(tty); gsm->output = gsmld_output; @@ -2241,6 +2238,7 @@ static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm) else { /* Don't register device 0 - this is the control channel and not a usable tty interface */ + base = gsm->num << 6; /* Base for this MUX */ for (i = 1; i < NUM_DLCI; i++) tty_register_device(gsm_tty_driver, base + i, NULL); } @@ -2368,6 +2366,7 @@ static void gsmld_close(struct tty_struct *tty) static int gsmld_open(struct tty_struct *tty) { struct gsm_mux *gsm; + int ret; if (tty->ops->write == NULL) return -EINVAL; @@ -2382,7 +2381,13 @@ static int gsmld_open(struct tty_struct *tty) /* Attach the initial passive connection */ gsm->encoding = 1; - return gsmld_attach_gsm(tty, gsm); + + ret = gsmld_attach_gsm(tty, gsm); + if (ret != 0) { + gsm_cleanup_mux(gsm); + mux_put(gsm); + } + return ret; } /** diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 25c9bc783722..9bbdb1de12e2 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -316,7 +316,7 @@ done: * pty_common_install - set up the pty pair * @driver: the pty driver * @tty: the tty being instantiated - * @bool: legacy, true if this is BSD style + * @legacy: true if this is BSD style * * Perform the initial set up for the tty/pty pair. Called from the * tty layer when the port is first opened. @@ -331,18 +331,17 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, int idx = tty->index; int retval = -ENOMEM; - o_tty = alloc_tty_struct(); - if (!o_tty) - goto err; ports[0] = kmalloc(sizeof **ports, GFP_KERNEL); ports[1] = kmalloc(sizeof **ports, GFP_KERNEL); if (!ports[0] || !ports[1]) - goto err_free_tty; + goto err; if (!try_module_get(driver->other->owner)) { /* This cannot in fact currently happen */ - goto err_free_tty; + goto err; } - initialize_tty_struct(o_tty, driver->other, idx); + o_tty = alloc_tty_struct(driver->other, idx); + if (!o_tty) + goto err_put_module; if (legacy) { /* We always use new tty termios data so we can do this @@ -387,12 +386,12 @@ err_free_termios: tty_free_termios(tty); err_deinit_tty: deinitialize_tty_struct(o_tty); - module_put(o_tty->driver->owner); -err_free_tty: - kfree(ports[0]); - kfree(ports[1]); free_tty_struct(o_tty); +err_put_module: + module_put(driver->other->owner); err: + kfree(ports[0]); + kfree(ports[1]); return retval; } diff --git a/drivers/tty/serial/21285.c b/drivers/tty/serial/21285.c index c7e8b60b6177..9b208bd686e6 100644 --- a/drivers/tty/serial/21285.c +++ b/drivers/tty/serial/21285.c @@ -78,10 +78,6 @@ static void serial21285_stop_rx(struct uart_port *port) } } -static void serial21285_enable_ms(struct uart_port *port) -{ -} - static irqreturn_t serial21285_rx_chars(int irq, void *dev_id) { struct uart_port *port = dev_id; @@ -345,7 +341,6 @@ static struct uart_ops serial21285_ops = { .stop_tx = serial21285_stop_tx, .start_tx = serial21285_start_tx, .stop_rx = serial21285_stop_rx, - .enable_ms = serial21285_enable_ms, .break_ctl = serial21285_break_ctl, .startup = serial21285_startup, .shutdown = serial21285_shutdown, diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 1ebf8538b4fa..1b08c918cd51 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -12,6 +12,7 @@ */ #include <linux/serial_8250.h> +#include <linux/serial_reg.h> #include <linux/dmaengine.h> struct uart_8250_dma { @@ -60,6 +61,7 @@ struct serial8250_config { unsigned short fifo_size; unsigned short tx_loadsz; unsigned char fcr; + unsigned char rxtrig_bytes[UART_FCR_R_TRIG_MAX_STATE]; unsigned int flags; }; diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 7a91c6d1eb7d..1d42dba6121d 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -31,7 +31,6 @@ #include <linux/tty.h> #include <linux/ratelimit.h> #include <linux/tty_flip.h> -#include <linux/serial_reg.h> #include <linux/serial_core.h> #include <linux/serial.h> #include <linux/serial_8250.h> @@ -161,6 +160,7 @@ static const struct serial8250_config uart_config[] = { .fifo_size = 16, .tx_loadsz = 16, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, + .rxtrig_bytes = {1, 4, 8, 14}, .flags = UART_CAP_FIFO, }, [PORT_CIRRUS] = { @@ -180,6 +180,7 @@ static const struct serial8250_config uart_config[] = { .tx_loadsz = 16, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_00, + .rxtrig_bytes = {8, 16, 24, 28}, .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, }, [PORT_16750] = { @@ -188,6 +189,7 @@ static const struct serial8250_config uart_config[] = { .tx_loadsz = 64, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10 | UART_FCR7_64BYTE, + .rxtrig_bytes = {1, 16, 32, 56}, .flags = UART_CAP_FIFO | UART_CAP_SLEEP | UART_CAP_AFE, }, [PORT_STARTECH] = { @@ -209,6 +211,7 @@ static const struct serial8250_config uart_config[] = { .tx_loadsz = 32, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_10, + .rxtrig_bytes = {8, 16, 56, 60}, .flags = UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP, }, [PORT_16850] = { @@ -266,6 +269,7 @@ static const struct serial8250_config uart_config[] = { .tx_loadsz = 8, .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01, + .rxtrig_bytes = {1, 4, 8, 14}, .flags = UART_CAP_FIFO | UART_CAP_RTOIE, }, [PORT_XR17D15X] = { @@ -439,8 +443,7 @@ static int exar_handle_irq(struct uart_port *port); static void set_io_from_upio(struct uart_port *p) { - struct uart_8250_port *up = - container_of(p, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(p); up->dl_read = default_serial_dl_read; up->dl_write = default_serial_dl_write; @@ -531,11 +534,8 @@ static void serial8250_clear_fifos(struct uart_8250_port *p) void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p) { - unsigned char fcr; - serial8250_clear_fifos(p); - fcr = uart_config[p->port.type].fcr; - serial_out(p, UART_FCR, fcr); + serial_out(p, UART_FCR, p->fcr); } EXPORT_SYMBOL_GPL(serial8250_clear_and_reinit_fifos); @@ -1277,8 +1277,7 @@ static inline void __stop_tx(struct uart_8250_port *p) static void serial8250_stop_tx(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); __stop_tx(up); @@ -1293,8 +1292,7 @@ static void serial8250_stop_tx(struct uart_port *port) static void serial8250_start_tx(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); if (up->dma && !serial8250_tx_dma(up)) { return; @@ -1322,8 +1320,7 @@ static void serial8250_start_tx(struct uart_port *port) static void serial8250_stop_rx(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); up->ier &= ~UART_IER_RLSI; up->port.read_status_mask &= ~UART_LSR_DR; @@ -1332,8 +1329,7 @@ static void serial8250_stop_rx(struct uart_port *port) static void serial8250_enable_ms(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); /* no MSR capabilities */ if (up->bugs & UART_BUG_NOMSR) @@ -1499,8 +1495,7 @@ int serial8250_handle_irq(struct uart_port *port, unsigned int iir) { unsigned char status; unsigned long flags; - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); int dma_err = 0; if (iir & UART_IIR_NO_INT) @@ -1785,8 +1780,7 @@ static void serial8250_backup_timeout(unsigned long data) static unsigned int serial8250_tx_empty(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; unsigned int lsr; @@ -1800,8 +1794,7 @@ static unsigned int serial8250_tx_empty(struct uart_port *port) static unsigned int serial8250_get_mctrl(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); unsigned int status; unsigned int ret; @@ -1821,8 +1814,7 @@ static unsigned int serial8250_get_mctrl(struct uart_port *port) static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); unsigned char mcr = 0; if (mctrl & TIOCM_RTS) @@ -1843,8 +1835,7 @@ static void serial8250_set_mctrl(struct uart_port *port, unsigned int mctrl) static void serial8250_break_ctl(struct uart_port *port, int break_state) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; spin_lock_irqsave(&port->lock, flags); @@ -1911,8 +1902,7 @@ static void serial8250_put_poll_char(struct uart_port *port, unsigned char c) { unsigned int ier; - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); /* * First save the IER then disable the interrupts @@ -1941,8 +1931,7 @@ static void serial8250_put_poll_char(struct uart_port *port, static int serial8250_startup(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; unsigned char lsr, iir; int retval; @@ -2194,8 +2183,7 @@ dont_test_tx_en: static void serial8250_shutdown(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); unsigned long flags; /* @@ -2268,12 +2256,10 @@ void serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); - unsigned char cval, fcr = 0; + struct uart_8250_port *up = up_to_u8250p(port); + unsigned char cval; unsigned long flags; unsigned int baud, quot; - int fifo_bug = 0; switch (termios->c_cflag & CSIZE) { case CS5: @@ -2296,7 +2282,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_cflag & PARENB) { cval |= UART_LCR_PARITY; if (up->bugs & UART_BUG_PARITY) - fifo_bug = 1; + up->fifo_bug = true; } if (!(termios->c_cflag & PARODD)) cval |= UART_LCR_EPAR; @@ -2320,10 +2306,10 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, quot++; if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) { - fcr = uart_config[port->type].fcr; - if ((baud < 2400 && !up->dma) || fifo_bug) { - fcr &= ~UART_FCR_TRIGGER_MASK; - fcr |= UART_FCR_TRIGGER_1; + /* NOTE: If fifo_bug is not set, a user can set RX_trigger. */ + if ((baud < 2400 && !up->dma) || up->fifo_bug) { + up->fcr &= ~UART_FCR_TRIGGER_MASK; + up->fcr |= UART_FCR_TRIGGER_1; } } @@ -2456,15 +2442,15 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, * is written without DLAB set, this mode will be disabled. */ if (port->type == PORT_16750) - serial_port_out(port, UART_FCR, fcr); + serial_port_out(port, UART_FCR, up->fcr); serial_port_out(port, UART_LCR, cval); /* reset DLAB */ up->lcr = cval; /* Save LCR */ if (port->type != PORT_16750) { /* emulated UARTs (Lucent Venus 167x) need two steps */ - if (fcr & UART_FCR_ENABLE_FIFO) + if (up->fcr & UART_FCR_ENABLE_FIFO) serial_port_out(port, UART_FCR, UART_FCR_ENABLE_FIFO); - serial_port_out(port, UART_FCR, fcr); /* set fcr */ + serial_port_out(port, UART_FCR, up->fcr); /* set fcr */ } serial8250_set_mctrl(port, port->mctrl); spin_unlock_irqrestore(&port->lock, flags); @@ -2498,8 +2484,7 @@ serial8250_set_ldisc(struct uart_port *port, int new) void serial8250_do_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { - struct uart_8250_port *p = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *p = up_to_u8250p(port); serial8250_set_sleep(p, state != 0); } @@ -2630,8 +2615,7 @@ static void serial8250_release_rsa_resource(struct uart_8250_port *up) static void serial8250_release_port(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); serial8250_release_std_resource(up); if (port->type == PORT_RSA) @@ -2640,8 +2624,7 @@ static void serial8250_release_port(struct uart_port *port) static int serial8250_request_port(struct uart_port *port) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); int ret; if (port->type == PORT_8250_CIR) @@ -2657,10 +2640,149 @@ static int serial8250_request_port(struct uart_port *port) return ret; } -static void serial8250_config_port(struct uart_port *port, int flags) +static int fcr_get_rxtrig_bytes(struct uart_8250_port *up) +{ + const struct serial8250_config *conf_type = &uart_config[up->port.type]; + unsigned char bytes; + + bytes = conf_type->rxtrig_bytes[UART_FCR_R_TRIG_BITS(up->fcr)]; + + return bytes ? bytes : -EOPNOTSUPP; +} + +static int bytes_to_fcr_rxtrig(struct uart_8250_port *up, unsigned char bytes) +{ + const struct serial8250_config *conf_type = &uart_config[up->port.type]; + int i; + + if (!conf_type->rxtrig_bytes[UART_FCR_R_TRIG_BITS(UART_FCR_R_TRIG_00)]) + return -EOPNOTSUPP; + + for (i = 1; i < UART_FCR_R_TRIG_MAX_STATE; i++) { + if (bytes < conf_type->rxtrig_bytes[i]) + /* Use the nearest lower value */ + return (--i) << UART_FCR_R_TRIG_SHIFT; + } + + return UART_FCR_R_TRIG_11; +} + +static int do_get_rxtrig(struct tty_port *port) +{ + struct uart_state *state = container_of(port, struct uart_state, port); + struct uart_port *uport = state->uart_port; + struct uart_8250_port *up = + container_of(uport, struct uart_8250_port, port); + + if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1) + return -EINVAL; + + return fcr_get_rxtrig_bytes(up); +} + +static int do_serial8250_get_rxtrig(struct tty_port *port) +{ + int rxtrig_bytes; + + mutex_lock(&port->mutex); + rxtrig_bytes = do_get_rxtrig(port); + mutex_unlock(&port->mutex); + + return rxtrig_bytes; +} + +static ssize_t serial8250_get_attr_rx_trig_bytes(struct device *dev, + struct device_attribute *attr, char *buf) { + struct tty_port *port = dev_get_drvdata(dev); + int rxtrig_bytes; + + rxtrig_bytes = do_serial8250_get_rxtrig(port); + if (rxtrig_bytes < 0) + return rxtrig_bytes; + + return snprintf(buf, PAGE_SIZE, "%d\n", rxtrig_bytes); +} + +static int do_set_rxtrig(struct tty_port *port, unsigned char bytes) +{ + struct uart_state *state = container_of(port, struct uart_state, port); + struct uart_port *uport = state->uart_port; struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + container_of(uport, struct uart_8250_port, port); + int rxtrig; + + if (!(up->capabilities & UART_CAP_FIFO) || uport->fifosize <= 1 || + up->fifo_bug) + return -EINVAL; + + rxtrig = bytes_to_fcr_rxtrig(up, bytes); + if (rxtrig < 0) + return rxtrig; + + serial8250_clear_fifos(up); + up->fcr &= ~UART_FCR_TRIGGER_MASK; + up->fcr |= (unsigned char)rxtrig; + serial_out(up, UART_FCR, up->fcr); + return 0; +} + +static int do_serial8250_set_rxtrig(struct tty_port *port, unsigned char bytes) +{ + int ret; + + mutex_lock(&port->mutex); + ret = do_set_rxtrig(port, bytes); + mutex_unlock(&port->mutex); + + return ret; +} + +static ssize_t serial8250_set_attr_rx_trig_bytes(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct tty_port *port = dev_get_drvdata(dev); + unsigned char bytes; + int ret; + + if (!count) + return -EINVAL; + + ret = kstrtou8(buf, 10, &bytes); + if (ret < 0) + return ret; + + ret = do_serial8250_set_rxtrig(port, bytes); + if (ret < 0) + return ret; + + return count; +} + +static DEVICE_ATTR(rx_trig_bytes, S_IRUSR | S_IWUSR | S_IRGRP, + serial8250_get_attr_rx_trig_bytes, + serial8250_set_attr_rx_trig_bytes); + +static struct attribute *serial8250_dev_attrs[] = { + &dev_attr_rx_trig_bytes.attr, + NULL, + }; + +static struct attribute_group serial8250_dev_attr_group = { + .attrs = serial8250_dev_attrs, + }; + +static void register_dev_spec_attr_grp(struct uart_8250_port *up) +{ + const struct serial8250_config *conf_type = &uart_config[up->port.type]; + + if (conf_type->rxtrig_bytes[0]) + up->port.attr_group = &serial8250_dev_attr_group; +} + +static void serial8250_config_port(struct uart_port *port, int flags) +{ + struct uart_8250_port *up = up_to_u8250p(port); int probeflags = PROBE_ANY; int ret; @@ -2705,6 +2827,9 @@ static void serial8250_config_port(struct uart_port *port, int flags) if ((port->type == PORT_XR17V35X) || (port->type == PORT_XR17D15X)) port->handle_irq = exar_handle_irq; + + register_dev_spec_attr_grp(up); + up->fcr = uart_config[up->port.type].fcr; } static int @@ -2859,8 +2984,7 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev) static void serial8250_console_putchar(struct uart_port *port, int ch) { - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); wait_for_xmitr(up, UART_LSR_THRE); serial_port_out(port, UART_TX, ch); diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 51b307aab75e..4db7987ec225 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -26,6 +26,7 @@ #include <linux/slab.h> #include <linux/acpi.h> #include <linux/clk.h> +#include <linux/reset.h> #include <linux/pm_runtime.h> #include <asm/byteorder.h> @@ -59,73 +60,17 @@ struct dw8250_data { int last_mcr; int line; struct clk *clk; + struct clk *pclk; + struct reset_control *rst; struct uart_8250_dma dma; }; -struct dw8250_acpi_desc { - void (*set_termios)(struct uart_port *p, struct ktermios *termios, - struct ktermios *old); -}; - #define BYT_PRV_CLK 0x800 #define BYT_PRV_CLK_EN (1 << 0) #define BYT_PRV_CLK_M_VAL_SHIFT 1 #define BYT_PRV_CLK_N_VAL_SHIFT 16 #define BYT_PRV_CLK_UPDATE (1 << 31) -static void byt_set_termios(struct uart_port *p, struct ktermios *termios, - struct ktermios *old) -{ - unsigned int baud = tty_termios_baud_rate(termios); - unsigned int m, n; - u32 reg; - - /* - * For baud rates 0.5M, 1M, 1.5M, 2M, 2.5M, 3M, 3.5M and 4M the - * dividers must be adjusted. - * - * uartclk = (m / n) * 100 MHz, where m <= n - */ - switch (baud) { - case 500000: - case 1000000: - case 2000000: - case 4000000: - m = 64; - n = 100; - p->uartclk = 64000000; - break; - case 3500000: - m = 56; - n = 100; - p->uartclk = 56000000; - break; - case 1500000: - case 3000000: - m = 48; - n = 100; - p->uartclk = 48000000; - break; - case 2500000: - m = 40; - n = 100; - p->uartclk = 40000000; - break; - default: - m = 2304; - n = 3125; - p->uartclk = 73728000; - } - - /* Reset the clock */ - reg = (m << BYT_PRV_CLK_M_VAL_SHIFT) | (n << BYT_PRV_CLK_N_VAL_SHIFT); - writel(reg, p->membase + BYT_PRV_CLK); - reg |= BYT_PRV_CLK_EN | BYT_PRV_CLK_UPDATE; - writel(reg, p->membase + BYT_PRV_CLK); - - serial8250_do_set_termios(p, termios, old); -} - static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value) { struct dw8250_data *d = p->private_data; @@ -141,8 +86,9 @@ static inline int dw8250_modify_msr(struct uart_port *p, int offset, int value) static void dw8250_force_idle(struct uart_port *p) { - serial8250_clear_and_reinit_fifos(container_of - (p, struct uart_8250_port, port)); + struct uart_8250_port *up = up_to_u8250p(p); + + serial8250_clear_and_reinit_fifos(up); (void)p->serial_in(p, UART_RX); } @@ -242,6 +188,32 @@ dw8250_do_pm(struct uart_port *port, unsigned int state, unsigned int old) pm_runtime_put_sync_suspend(port->dev); } +static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios, + struct ktermios *old) +{ + unsigned int baud = tty_termios_baud_rate(termios); + struct dw8250_data *d = p->private_data; + unsigned int rate; + int ret; + + if (IS_ERR(d->clk) || !old) + goto out; + + /* Not requesting clock rates below 1.8432Mhz */ + if (baud < 115200) + baud = 115200; + + clk_disable_unprepare(d->clk); + rate = clk_round_rate(d->clk, baud * 16); + ret = clk_set_rate(d->clk, rate); + clk_prepare_enable(d->clk); + + if (!ret) + p->uartclk = rate; +out: + serial8250_do_set_termios(p, termios, old); +} + static bool dw8250_dma_filter(struct dma_chan *chan, void *param) { struct dw8250_data *data = param; @@ -286,6 +258,7 @@ static int dw8250_probe_of(struct uart_port *p, struct dw8250_data *data) { struct device_node *np = p->dev->of_node; + struct uart_8250_port *up = up_to_u8250p(p); u32 val; bool has_ucv = true; @@ -299,7 +272,7 @@ static int dw8250_probe_of(struct uart_port *p, p->membase += 7; #endif p->serial_out = dw8250_serial_out_rb; - p->flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; + p->flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; p->type = PORT_OCTEON; data->usr_reg = 0x27; has_ucv = false; @@ -318,7 +291,7 @@ static int dw8250_probe_of(struct uart_port *p, } } if (has_ucv) - dw8250_setup_port(container_of(p, struct uart_8250_port, port)); + dw8250_setup_port(up); if (!of_property_read_u32(np, "reg-shift", &val)) p->regshift = val; @@ -340,16 +313,10 @@ static int dw8250_probe_of(struct uart_port *p, static int dw8250_probe_acpi(struct uart_8250_port *up, struct dw8250_data *data) { - const struct acpi_device_id *id; struct uart_port *p = &up->port; - struct dw8250_acpi_desc *acpi_desc; dw8250_setup_port(up); - id = acpi_match_device(p->dev->driver->acpi_match_table, p->dev); - if (!id) - return -ENODEV; - p->iotype = UPIO_MEM32; p->serial_in = dw8250_serial_in32; p->serial_out = dw8250_serial_out32; @@ -360,12 +327,7 @@ static int dw8250_probe_acpi(struct uart_8250_port *up, up->dma->rxconf.src_maxburst = p->fifosize / 4; up->dma->txconf.dst_maxburst = p->fifosize / 4; - acpi_desc = (struct dw8250_acpi_desc *)id->driver_data; - if (!acpi_desc) - return 0; - - if (acpi_desc->set_termios) - p->set_termios = acpi_desc->set_termios; + up->port.set_termios = dw8250_set_termios; return 0; } @@ -402,11 +364,40 @@ static int dw8250_probe(struct platform_device *pdev) return -ENOMEM; data->usr_reg = DW_UART_USR; - data->clk = devm_clk_get(&pdev->dev, NULL); + data->clk = devm_clk_get(&pdev->dev, "baudclk"); + if (IS_ERR(data->clk) && PTR_ERR(data->clk) != -EPROBE_DEFER) + data->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(data->clk) && PTR_ERR(data->clk) == -EPROBE_DEFER) + return -EPROBE_DEFER; if (!IS_ERR(data->clk)) { - clk_prepare_enable(data->clk); - uart.port.uartclk = clk_get_rate(data->clk); + err = clk_prepare_enable(data->clk); + if (err) + dev_warn(&pdev->dev, "could not enable optional baudclk: %d\n", + err); + else + uart.port.uartclk = clk_get_rate(data->clk); + } + + data->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); + if (IS_ERR(data->clk) && PTR_ERR(data->clk) == -EPROBE_DEFER) { + err = -EPROBE_DEFER; + goto err_clk; } + if (!IS_ERR(data->pclk)) { + err = clk_prepare_enable(data->pclk); + if (err) { + dev_err(&pdev->dev, "could not enable apb_pclk\n"); + goto err_clk; + } + } + + data->rst = devm_reset_control_get_optional(&pdev->dev, NULL); + if (IS_ERR(data->rst) && PTR_ERR(data->rst) == -EPROBE_DEFER) { + err = -EPROBE_DEFER; + goto err_pclk; + } + if (!IS_ERR(data->rst)) + reset_control_deassert(data->rst); data->dma.rx_chan_id = -1; data->dma.tx_chan_id = -1; @@ -422,18 +413,21 @@ static int dw8250_probe(struct platform_device *pdev) if (pdev->dev.of_node) { err = dw8250_probe_of(&uart.port, data); if (err) - return err; + goto err_reset; } else if (ACPI_HANDLE(&pdev->dev)) { err = dw8250_probe_acpi(&uart, data); if (err) - return err; + goto err_reset; } else { - return -ENODEV; + err = -ENODEV; + goto err_reset; } data->line = serial8250_register_8250_port(&uart); - if (data->line < 0) - return data->line; + if (data->line < 0) { + err = data->line; + goto err_reset; + } platform_set_drvdata(pdev, data); @@ -441,6 +435,20 @@ static int dw8250_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); return 0; + +err_reset: + if (!IS_ERR(data->rst)) + reset_control_assert(data->rst); + +err_pclk: + if (!IS_ERR(data->pclk)) + clk_disable_unprepare(data->pclk); + +err_clk: + if (!IS_ERR(data->clk)) + clk_disable_unprepare(data->clk); + + return err; } static int dw8250_remove(struct platform_device *pdev) @@ -451,6 +459,12 @@ static int dw8250_remove(struct platform_device *pdev) serial8250_unregister_port(data->line); + if (!IS_ERR(data->rst)) + reset_control_assert(data->rst); + + if (!IS_ERR(data->pclk)) + clk_disable_unprepare(data->pclk); + if (!IS_ERR(data->clk)) clk_disable_unprepare(data->clk); @@ -488,6 +502,9 @@ static int dw8250_runtime_suspend(struct device *dev) if (!IS_ERR(data->clk)) clk_disable_unprepare(data->clk); + if (!IS_ERR(data->pclk)) + clk_disable_unprepare(data->pclk); + return 0; } @@ -495,6 +512,9 @@ static int dw8250_runtime_resume(struct device *dev) { struct dw8250_data *data = dev_get_drvdata(dev); + if (!IS_ERR(data->pclk)) + clk_prepare_enable(data->pclk); + if (!IS_ERR(data->clk)) clk_prepare_enable(data->clk); @@ -514,16 +534,12 @@ static const struct of_device_id dw8250_of_match[] = { }; MODULE_DEVICE_TABLE(of, dw8250_of_match); -static struct dw8250_acpi_desc byt_8250_desc = { - .set_termios = byt_set_termios, -}; - static const struct acpi_device_id dw8250_acpi_match[] = { { "INT33C4", 0 }, { "INT33C5", 0 }, { "INT3434", 0 }, { "INT3435", 0 }, - { "80860F0A", (kernel_ulong_t)&byt_8250_desc}, + { "80860F0A", 0 }, { }, }; MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match); diff --git a/drivers/tty/serial/8250/8250_fsl.c b/drivers/tty/serial/8250/8250_fsl.c index f4d3c47b88e8..c0533a57ec53 100644 --- a/drivers/tty/serial/8250/8250_fsl.c +++ b/drivers/tty/serial/8250/8250_fsl.c @@ -28,8 +28,7 @@ int fsl8250_handle_irq(struct uart_port *port) unsigned char lsr, orig_lsr; unsigned long flags; unsigned int iir; - struct uart_8250_port *up = - container_of(port, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(port); spin_lock_irqsave(&up->port.lock, flags); diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 33137b3ba94d..61830b1792eb 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1581,8 +1581,7 @@ static int skip_tx_en_setup(struct serial_private *priv, static void kt_handle_break(struct uart_port *p) { - struct uart_8250_port *up = - container_of(p, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(p); /* * On receipt of a BI, serial device in Intel ME (Intel * management engine) needs to have its fifos cleared for sane @@ -1593,8 +1592,7 @@ static void kt_handle_break(struct uart_port *p) static unsigned int kt_serial_in(struct uart_port *p, int offset) { - struct uart_8250_port *up = - container_of(p, struct uart_8250_port, port); + struct uart_8250_port *up = up_to_u8250p(p); unsigned int val; /* diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index fb57159bad3a..26cec64dadd7 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -238,7 +238,6 @@ config SERIAL_SAMSUNG_UARTS_4 config SERIAL_SAMSUNG_UARTS int depends on PLAT_SAMSUNG - default 6 if CPU_S5P6450 default 4 if SERIAL_SAMSUNG_UARTS_4 || CPU_S3C2416 default 3 help @@ -774,7 +773,7 @@ config SERIAL_HS_LPC32XX config SERIAL_HS_LPC32XX_CONSOLE bool "Enable LPC32XX high speed UART serial console" - depends on SERIAL_HS_LPC32XX + depends on SERIAL_HS_LPC32XX=y select SERIAL_CORE_CONSOLE help If you would like to be able to use one of the high speed serial @@ -1473,6 +1472,7 @@ config SERIAL_ARC_CONSOLE bool "Console on ARC UART" depends on SERIAL_ARC=y select SERIAL_CORE_CONSOLE + select SERIAL_EARLYCON help Enable system Console on ARC UART diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c index 59b3da9bcc3f..d22e3d98ae23 100644 --- a/drivers/tty/serial/altera_jtaguart.c +++ b/drivers/tty/serial/altera_jtaguart.c @@ -109,10 +109,6 @@ static void altera_jtaguart_break_ctl(struct uart_port *port, int break_state) { } -static void altera_jtaguart_enable_ms(struct uart_port *port) -{ -} - static void altera_jtaguart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) @@ -291,7 +287,6 @@ static struct uart_ops altera_jtaguart_ops = { .start_tx = altera_jtaguart_start_tx, .stop_tx = altera_jtaguart_stop_tx, .stop_rx = altera_jtaguart_stop_rx, - .enable_ms = altera_jtaguart_enable_ms, .break_ctl = altera_jtaguart_break_ctl, .startup = altera_jtaguart_startup, .shutdown = altera_jtaguart_shutdown, @@ -309,9 +304,8 @@ static struct altera_jtaguart altera_jtaguart_ports[ALTERA_JTAGUART_MAXPORTS]; #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) #if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS) -static void altera_jtaguart_console_putc(struct console *co, const char c) +static void altera_jtaguart_console_putc(struct uart_port *port, int c) { - struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; unsigned long status; unsigned long flags; @@ -330,9 +324,8 @@ static void altera_jtaguart_console_putc(struct console *co, const char c) spin_unlock_irqrestore(&port->lock, flags); } #else -static void altera_jtaguart_console_putc(struct console *co, const char c) +static void altera_jtaguart_console_putc(struct uart_port *port, int c) { - struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; unsigned long flags; spin_lock_irqsave(&port->lock, flags); @@ -350,11 +343,9 @@ static void altera_jtaguart_console_putc(struct console *co, const char c) static void altera_jtaguart_console_write(struct console *co, const char *s, unsigned int count) { - for (; count; count--, s++) { - altera_jtaguart_console_putc(co, *s); - if (*s == '\n') - altera_jtaguart_console_putc(co, '\r'); - } + struct uart_port *port = &(altera_jtaguart_ports + co->index)->port; + + uart_console_write(port, s, count, altera_jtaguart_console_putc); } static int __init altera_jtaguart_console_setup(struct console *co, diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 323376668b72..6a243239dbef 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -163,10 +163,6 @@ static void altera_uart_break_ctl(struct uart_port *port, int break_state) spin_unlock_irqrestore(&port->lock, flags); } -static void altera_uart_enable_ms(struct uart_port *port) -{ -} - static void altera_uart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) @@ -415,7 +411,6 @@ static struct uart_ops altera_uart_ops = { .start_tx = altera_uart_start_tx, .stop_tx = altera_uart_stop_tx, .stop_rx = altera_uart_stop_rx, - .enable_ms = altera_uart_enable_ms, .break_ctl = altera_uart_break_ctl, .startup = altera_uart_startup, .shutdown = altera_uart_shutdown, @@ -435,7 +430,7 @@ static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS]; #if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) -static void altera_uart_console_putc(struct uart_port *port, const char c) +static void altera_uart_console_putc(struct uart_port *port, int c) { while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & ALTERA_UART_STATUS_TRDY_MSK)) @@ -449,11 +444,7 @@ static void altera_uart_console_write(struct console *co, const char *s, { struct uart_port *port = &(altera_uart_ports + co->index)->port; - for (; count; count--, s++) { - altera_uart_console_putc(port, *s); - if (*s == '\n') - altera_uart_console_putc(port, '\r'); - } + uart_console_write(port, s, count, altera_uart_console_putc); } static int __init altera_uart_console_setup(struct console *co, char *options) diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index 971af1e22d0f..2064d31d0c8b 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -46,8 +46,7 @@ #include <linux/amba/serial.h> #include <linux/clk.h> #include <linux/slab.h> - -#include <asm/io.h> +#include <linux/io.h> #define UART_NR 8 @@ -688,28 +687,22 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id) if (amba_ports[i] == NULL) break; - if (i == ARRAY_SIZE(amba_ports)) { - ret = -EBUSY; - goto out; - } + if (i == ARRAY_SIZE(amba_ports)) + return -EBUSY; - uap = kzalloc(sizeof(struct uart_amba_port), GFP_KERNEL); - if (!uap) { - ret = -ENOMEM; - goto out; - } + uap = devm_kzalloc(&dev->dev, sizeof(struct uart_amba_port), + GFP_KERNEL); + if (!uap) + return -ENOMEM; - base = ioremap(dev->res.start, resource_size(&dev->res)); - if (!base) { - ret = -ENOMEM; - goto free; - } + base = devm_ioremap(&dev->dev, dev->res.start, + resource_size(&dev->res)); + if (!base) + return -ENOMEM; - uap->clk = clk_get(&dev->dev, NULL); - if (IS_ERR(uap->clk)) { - ret = PTR_ERR(uap->clk); - goto unmap; - } + uap->clk = devm_clk_get(&dev->dev, NULL); + if (IS_ERR(uap->clk)) + return PTR_ERR(uap->clk); uap->port.dev = &dev->dev; uap->port.mapbase = dev->res.start; @@ -727,15 +720,9 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id) amba_set_drvdata(dev, uap); ret = uart_add_one_port(&amba_reg, &uap->port); - if (ret) { + if (ret) amba_ports[i] = NULL; - clk_put(uap->clk); - unmap: - iounmap(base); - free: - kfree(uap); - } - out: + return ret; } @@ -750,9 +737,6 @@ static int pl010_remove(struct amba_device *dev) if (amba_ports[i] == uap) amba_ports[i] = NULL; - iounmap(uap->port.membase); - clk_put(uap->clk); - kfree(uap); return 0; } diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 0e26dcbd5ea4..8572f2a57fc8 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1484,7 +1484,7 @@ static int pl011_hwinit(struct uart_port *port) */ retval = clk_prepare_enable(uap->clk); if (retval) - goto out; + return retval; uap->port.uartclk = clk_get_rate(uap->clk); @@ -1507,8 +1507,6 @@ static int pl011_hwinit(struct uart_port *port) plat->init(); } return 0; - out: - return retval; } static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h) @@ -2131,32 +2129,24 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) if (amba_ports[i] == NULL) break; - if (i == ARRAY_SIZE(amba_ports)) { - ret = -EBUSY; - goto out; - } + if (i == ARRAY_SIZE(amba_ports)) + return -EBUSY; uap = devm_kzalloc(&dev->dev, sizeof(struct uart_amba_port), GFP_KERNEL); - if (uap == NULL) { - ret = -ENOMEM; - goto out; - } + if (uap == NULL) + return -ENOMEM; i = pl011_probe_dt_alias(i, &dev->dev); base = devm_ioremap(&dev->dev, dev->res.start, resource_size(&dev->res)); - if (!base) { - ret = -ENOMEM; - goto out; - } + if (!base) + return -ENOMEM; uap->clk = devm_clk_get(&dev->dev, NULL); - if (IS_ERR(uap->clk)) { - ret = PTR_ERR(uap->clk); - goto out; - } + if (IS_ERR(uap->clk)) + return PTR_ERR(uap->clk); uap->vendor = vendor; uap->lcrh_rx = vendor->lcrh_rx; @@ -2198,7 +2188,7 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) uart_unregister_driver(&amba_reg); pl011_dma_remove(uap); } - out: + return ret; } diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c index de11ab8ffd91..a34a0cec1685 100644 --- a/drivers/tty/serial/apbuart.c +++ b/drivers/tty/serial/apbuart.c @@ -71,11 +71,6 @@ static void apbuart_stop_rx(struct uart_port *port) UART_PUT_CTRL(port, cr); } -static void apbuart_enable_ms(struct uart_port *port) -{ - /* No modem status change interrupts for APBUART */ -} - static void apbuart_rx_chars(struct uart_port *port) { unsigned int status, ch, rsr, flag; @@ -337,7 +332,6 @@ static struct uart_ops grlib_apbuart_ops = { .stop_tx = apbuart_stop_tx, .start_tx = apbuart_start_tx, .stop_rx = apbuart_stop_rx, - .enable_ms = apbuart_enable_ms, .break_ctl = apbuart_break_ctl, .startup = apbuart_startup, .shutdown = apbuart_shutdown, diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index acd03af7cd52..0be1c45efd65 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -176,10 +176,6 @@ static void ar933x_uart_break_ctl(struct uart_port *port, int break_state) spin_unlock_irqrestore(&up->port.lock, flags); } -static void ar933x_uart_enable_ms(struct uart_port *port) -{ -} - /* * baudrate = (clk / (scale + 1)) * (step * (1 / 2^17)) */ @@ -495,7 +491,6 @@ static struct uart_ops ar933x_uart_ops = { .stop_tx = ar933x_uart_stop_tx, .start_tx = ar933x_uart_start_tx, .stop_rx = ar933x_uart_stop_rx, - .enable_ms = ar933x_uart_enable_ms, .break_ctl = ar933x_uart_break_ctl, .startup = ar933x_uart_startup, .shutdown = ar933x_uart_shutdown, diff --git a/drivers/tty/serial/arc_uart.c b/drivers/tty/serial/arc_uart.c index 008c223eaf26..a59d1d77e750 100644 --- a/drivers/tty/serial/arc_uart.c +++ b/drivers/tty/serial/arc_uart.c @@ -37,8 +37,8 @@ #include <linux/tty_flip.h> #include <linux/serial_core.h> #include <linux/io.h> -#include <linux/of.h> -#include <linux/of_platform.h> +#include <linux/of_irq.h> +#include <linux/of_address.h> /************************************* * ARC UART Hardware Specs @@ -72,7 +72,7 @@ #define RXOERR 0x02 /* OverFlow Err: Char recv but RXFULL still set */ /* Uart bit fiddling helpers: lowest level */ -#define RBASE(uart, reg) (uart->port.membase + reg) +#define RBASE(port, reg) (port->membase + reg) #define UART_REG_SET(u, r, v) writeb((v), RBASE(u, r)) #define UART_REG_GET(u, r) readb(RBASE(u, r)) @@ -102,7 +102,6 @@ struct arc_uart_port { struct uart_port port; unsigned long baud; - int is_emulated; /* H/w vs. Instruction Set Simulator */ }; #define to_arc_port(uport) container_of(uport, struct arc_uart_port, port) @@ -129,19 +128,15 @@ static struct uart_driver arc_uart_driver = { static void arc_serial_stop_rx(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); - - UART_RX_IRQ_DISABLE(uart); + UART_RX_IRQ_DISABLE(port); } static void arc_serial_stop_tx(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); - - while (!(UART_GET_STATUS(uart) & TXEMPTY)) + while (!(UART_GET_STATUS(port) & TXEMPTY)) cpu_relax(); - UART_TX_IRQ_DISABLE(uart); + UART_TX_IRQ_DISABLE(port); } /* @@ -149,10 +144,9 @@ static void arc_serial_stop_tx(struct uart_port *port) */ static unsigned int arc_serial_tx_empty(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); unsigned int stat; - stat = UART_GET_STATUS(uart); + stat = UART_GET_STATUS(port); if (stat & TXEMPTY) return TIOCSER_TEMT; @@ -166,24 +160,24 @@ static unsigned int arc_serial_tx_empty(struct uart_port *port) * = by uart_start( ) before calling us * = tx_ist checks that too before calling */ -static void arc_serial_tx_chars(struct arc_uart_port *uart) +static void arc_serial_tx_chars(struct uart_port *port) { - struct circ_buf *xmit = &uart->port.state->xmit; + struct circ_buf *xmit = &port->state->xmit; int sent = 0; unsigned char ch; - if (unlikely(uart->port.x_char)) { - UART_SET_DATA(uart, uart->port.x_char); - uart->port.icount.tx++; - uart->port.x_char = 0; + if (unlikely(port->x_char)) { + UART_SET_DATA(port, port->x_char); + port->icount.tx++; + port->x_char = 0; sent = 1; } else if (!uart_circ_empty(xmit)) { ch = xmit->buf[xmit->tail]; xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - uart->port.icount.tx++; - while (!(UART_GET_STATUS(uart) & TXEMPTY)) + port->icount.tx++; + while (!(UART_GET_STATUS(port) & TXEMPTY)) cpu_relax(); - UART_SET_DATA(uart, ch); + UART_SET_DATA(port, ch); sent = 1; } @@ -192,10 +186,10 @@ static void arc_serial_tx_chars(struct arc_uart_port *uart) * By Hard ISR to schedule processing in software interrupt part */ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&uart->port); + uart_write_wakeup(port); if (sent) - UART_TX_IRQ_ENABLE(uart); + UART_TX_IRQ_ENABLE(port); } /* @@ -204,12 +198,10 @@ static void arc_serial_tx_chars(struct arc_uart_port *uart) */ static void arc_serial_start_tx(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); - - arc_serial_tx_chars(uart); + arc_serial_tx_chars(port); } -static void arc_serial_rx_chars(struct arc_uart_port *uart, unsigned int status) +static void arc_serial_rx_chars(struct uart_port *port, unsigned int status) { unsigned int ch, flg = 0; @@ -229,15 +221,15 @@ static void arc_serial_rx_chars(struct arc_uart_port *uart, unsigned int status) */ if (unlikely(status & (RXOERR | RXFERR))) { if (status & RXOERR) { - uart->port.icount.overrun++; + port->icount.overrun++; flg = TTY_OVERRUN; - UART_CLR_STATUS(uart, RXOERR); + UART_CLR_STATUS(port, RXOERR); } if (status & RXFERR) { - uart->port.icount.frame++; + port->icount.frame++; flg = TTY_FRAME; - UART_CLR_STATUS(uart, RXFERR); + UART_CLR_STATUS(port, RXFERR); } } else flg = TTY_NORMAL; @@ -245,16 +237,16 @@ static void arc_serial_rx_chars(struct arc_uart_port *uart, unsigned int status) if (status & RXEMPTY) continue; - ch = UART_GET_DATA(uart); - uart->port.icount.rx++; + ch = UART_GET_DATA(port); + port->icount.rx++; - if (!(uart_handle_sysrq_char(&uart->port, ch))) - uart_insert_char(&uart->port, status, RXOERR, ch, flg); + if (!(uart_handle_sysrq_char(port, ch))) + uart_insert_char(port, status, RXOERR, ch, flg); - spin_unlock(&uart->port.lock); - tty_flip_buffer_push(&uart->port.state->port); - spin_lock(&uart->port.lock); - } while (!((status = UART_GET_STATUS(uart)) & RXEMPTY)); + spin_unlock(&port->lock); + tty_flip_buffer_push(&port->state->port); + spin_lock(&port->lock); + } while (!((status = UART_GET_STATUS(port)) & RXEMPTY)); } /* @@ -287,10 +279,10 @@ static void arc_serial_rx_chars(struct arc_uart_port *uart, unsigned int status) static irqreturn_t arc_serial_isr(int irq, void *dev_id) { - struct arc_uart_port *uart = dev_id; + struct uart_port *port = dev_id; unsigned int status; - status = UART_GET_STATUS(uart); + status = UART_GET_STATUS(port); /* * Single IRQ for both Rx (data available) Tx (room available) Interrupt @@ -300,9 +292,9 @@ static irqreturn_t arc_serial_isr(int irq, void *dev_id) if (status & RXIENB) { /* already in ISR, no need of xx_irqsave */ - spin_lock(&uart->port.lock); - arc_serial_rx_chars(uart, status); - spin_unlock(&uart->port.lock); + spin_lock(&port->lock); + arc_serial_rx_chars(port, status); + spin_unlock(&port->lock); } if ((status & TXIENB) && (status & TXEMPTY)) { @@ -310,14 +302,14 @@ static irqreturn_t arc_serial_isr(int irq, void *dev_id) /* Unconditionally disable further Tx-Interrupts. * will be enabled by tx_chars() if needed. */ - UART_TX_IRQ_DISABLE(uart); + UART_TX_IRQ_DISABLE(port); - spin_lock(&uart->port.lock); + spin_lock(&port->lock); - if (!uart_tx_stopped(&uart->port)) - arc_serial_tx_chars(uart); + if (!uart_tx_stopped(port)) + arc_serial_tx_chars(port); - spin_unlock(&uart->port.lock); + spin_unlock(&port->lock); } return IRQ_HANDLED; @@ -340,13 +332,6 @@ static void arc_serial_set_mctrl(struct uart_port *port, unsigned int mctrl) /* MCR not present */ } -/* Enable Modem Status Interrupts */ - -static void arc_serial_enable_ms(struct uart_port *port) -{ - /* MSR not present */ -} - static void arc_serial_break_ctl(struct uart_port *port, int break_state) { /* ARC UART doesn't support sending Break signal */ @@ -354,18 +339,15 @@ static void arc_serial_break_ctl(struct uart_port *port, int break_state) static int arc_serial_startup(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); - /* Before we hook up the ISR, Disable all UART Interrupts */ - UART_ALL_IRQ_DISABLE(uart); + UART_ALL_IRQ_DISABLE(port); - if (request_irq(uart->port.irq, arc_serial_isr, 0, "arc uart rx-tx", - uart)) { - dev_warn(uart->port.dev, "Unable to attach ARC UART intr\n"); + if (request_irq(port->irq, arc_serial_isr, 0, "arc uart rx-tx", port)) { + dev_warn(port->dev, "Unable to attach ARC UART intr\n"); return -EBUSY; } - UART_RX_IRQ_ENABLE(uart); /* Only Rx IRQ enabled to begin with */ + UART_RX_IRQ_ENABLE(port); /* Only Rx IRQ enabled to begin with */ return 0; } @@ -373,8 +355,7 @@ static int arc_serial_startup(struct uart_port *port) /* This is not really needed */ static void arc_serial_shutdown(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); - free_irq(uart->port.irq, uart); + free_irq(port->irq, port); } static void @@ -398,25 +379,14 @@ arc_serial_set_termios(struct uart_port *port, struct ktermios *new, uartl = hw_val & 0xFF; uarth = (hw_val >> 8) & 0xFF; - /* - * UART ISS(Instruction Set simulator) emulation has a subtle bug: - * A existing value of Baudh = 0 is used as a indication to startup - * it's internal state machine. - * Thus if baudh is set to 0, 2 times, it chokes. - * This happens with BAUD=115200 and the formaula above - * Until that is fixed, when running on ISS, we will set baudh to !0 - */ - if (uart->is_emulated) - uarth = 1; - spin_lock_irqsave(&port->lock, flags); - UART_ALL_IRQ_DISABLE(uart); + UART_ALL_IRQ_DISABLE(port); - UART_SET_BAUDL(uart, uartl); - UART_SET_BAUDH(uart, uarth); + UART_SET_BAUDL(port, uartl); + UART_SET_BAUDH(port, uarth); - UART_RX_IRQ_ENABLE(uart); + UART_RX_IRQ_ENABLE(port); /* * UART doesn't support Parity/Hardware Flow Control; @@ -439,9 +409,7 @@ arc_serial_set_termios(struct uart_port *port, struct ktermios *new, static const char *arc_serial_type(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); - - return uart->port.type == PORT_ARC ? DRIVER_NAME : NULL; + return port->type == PORT_ARC ? DRIVER_NAME : NULL; } static void arc_serial_release_port(struct uart_port *port) @@ -470,35 +438,28 @@ arc_serial_verify_port(struct uart_port *port, struct serial_struct *ser) */ static void arc_serial_config_port(struct uart_port *port, int flags) { - struct arc_uart_port *uart = to_arc_port(port); - if (flags & UART_CONFIG_TYPE) - uart->port.type = PORT_ARC; + port->type = PORT_ARC; } -#if defined(CONFIG_CONSOLE_POLL) || defined(CONFIG_SERIAL_ARC_CONSOLE) +#ifdef CONFIG_CONSOLE_POLL static void arc_serial_poll_putchar(struct uart_port *port, unsigned char chr) { - struct arc_uart_port *uart = to_arc_port(port); - - while (!(UART_GET_STATUS(uart) & TXEMPTY)) + while (!(UART_GET_STATUS(port) & TXEMPTY)) cpu_relax(); - UART_SET_DATA(uart, chr); + UART_SET_DATA(port, chr); } -#endif -#ifdef CONFIG_CONSOLE_POLL static int arc_serial_poll_getchar(struct uart_port *port) { - struct arc_uart_port *uart = to_arc_port(port); unsigned char chr; - while (!(UART_GET_STATUS(uart) & RXEMPTY)) + while (!(UART_GET_STATUS(port) & RXEMPTY)) cpu_relax(); - chr = UART_GET_DATA(uart); + chr = UART_GET_DATA(port); return chr; } #endif @@ -510,7 +471,6 @@ static struct uart_ops arc_serial_pops = { .stop_tx = arc_serial_stop_tx, .start_tx = arc_serial_start_tx, .stop_rx = arc_serial_stop_rx, - .enable_ms = arc_serial_enable_ms, .break_ctl = arc_serial_break_ctl, .startup = arc_serial_startup, .shutdown = arc_serial_shutdown, @@ -526,71 +486,6 @@ static struct uart_ops arc_serial_pops = { #endif }; -static int -arc_uart_init_one(struct platform_device *pdev, int dev_id) -{ - struct resource *res, *res2; - unsigned long *plat_data; - struct arc_uart_port *uart = &arc_uart_ports[dev_id]; - - plat_data = dev_get_platdata(&pdev->dev); - if (!plat_data) - return -ENODEV; - - uart->is_emulated = !!plat_data[0]; /* workaround ISS bug */ - - if (is_early_platform_device(pdev)) { - uart->port.uartclk = plat_data[1]; - uart->baud = plat_data[2]; - } else { - struct device_node *np = pdev->dev.of_node; - u32 val; - - if (of_property_read_u32(np, "clock-frequency", &val)) { - dev_err(&pdev->dev, "clock-frequency property NOTset\n"); - return -EINVAL; - } - uart->port.uartclk = val; - - if (of_property_read_u32(np, "current-speed", &val)) { - dev_err(&pdev->dev, "current-speed property NOT set\n"); - return -EINVAL; - } - uart->baud = val; - } - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!res2) - return -ENODEV; - - uart->port.mapbase = res->start; - uart->port.membase = ioremap_nocache(res->start, resource_size(res)); - if (!uart->port.membase) - /* No point of dev_err since UART itself is hosed here */ - return -ENXIO; - - uart->port.irq = res2->start; - uart->port.dev = &pdev->dev; - uart->port.iotype = UPIO_MEM; - uart->port.flags = UPF_BOOT_AUTOCONF; - uart->port.line = dev_id; - uart->port.ops = &arc_serial_pops; - - uart->port.fifosize = ARC_UART_TX_FIFO_SIZE; - - /* - * uart_insert_char( ) uses it in decideding whether to ignore a - * char or not. Explicitly setting it here, removes the subtelty - */ - uart->port.ignore_status_mask = 0; - - return 0; -} - #ifdef CONFIG_SERIAL_ARC_CONSOLE static int arc_serial_console_setup(struct console *co, char *options) @@ -624,7 +519,10 @@ static int arc_serial_console_setup(struct console *co, char *options) static void arc_serial_console_putchar(struct uart_port *port, int ch) { - arc_serial_poll_putchar(port, (unsigned char)ch); + while (!(UART_GET_STATUS(port) & TXEMPTY)) + cpu_relax(); + + UART_SET_DATA(port, (unsigned char)ch); } /* @@ -651,48 +549,45 @@ static struct console arc_console = { .data = &arc_uart_driver }; -static __init void early_serial_write(struct console *con, const char *s, - unsigned int n) +static __init void arc_early_serial_write(struct console *con, const char *s, + unsigned int n) { - struct uart_port *port = &arc_uart_ports[con->index].port; - unsigned int i; + struct earlycon_device *dev = con->data; - for (i = 0; i < n; i++, s++) { - if (*s == '\n') - arc_serial_poll_putchar(port, '\r'); - arc_serial_poll_putchar(port, *s); - } + uart_console_write(&dev->port, s, n, arc_serial_console_putchar); } -static struct console arc_early_serial_console __initdata = { - .name = "early_ARCuart", - .write = early_serial_write, - .flags = CON_PRINTBUFFER | CON_BOOT, - .index = -1 -}; - -static int __init arc_serial_probe_earlyprintk(struct platform_device *pdev) +static int __init arc_early_console_setup(struct earlycon_device *dev, + const char *opt) { - int dev_id = pdev->id < 0 ? 0 : pdev->id; - int rc; + struct uart_port *port = &dev->port; + unsigned int l, h, hw_val; - arc_early_serial_console.index = dev_id; + if (!dev->port.membase) + return -ENODEV; - rc = arc_uart_init_one(pdev, dev_id); - if (rc) - panic("early console init failed\n"); + hw_val = port->uartclk / (dev->baud * 4) - 1; + l = hw_val & 0xFF; + h = (hw_val >> 8) & 0xFF; - arc_serial_console_setup(&arc_early_serial_console, NULL); + UART_SET_BAUDL(port, l); + UART_SET_BAUDH(port, h); - register_console(&arc_early_serial_console); + dev->con->write = arc_early_serial_write; return 0; } +EARLYCON_DECLARE(arc_uart, arc_early_console_setup); +OF_EARLYCON_DECLARE(arc_uart, "snps,arc-uart", arc_early_console_setup); + #endif /* CONFIG_SERIAL_ARC_CONSOLE */ static int arc_serial_probe(struct platform_device *pdev) { - int rc, dev_id; struct device_node *np = pdev->dev.of_node; + struct arc_uart_port *uart; + struct uart_port *port; + int dev_id; + u32 val; /* no device tree device */ if (!np) @@ -702,12 +597,43 @@ static int arc_serial_probe(struct platform_device *pdev) if (dev_id < 0) dev_id = 0; - rc = arc_uart_init_one(pdev, dev_id); - if (rc) - return rc; + uart = &arc_uart_ports[dev_id]; + port = &uart->port; + + if (of_property_read_u32(np, "clock-frequency", &val)) { + dev_err(&pdev->dev, "clock-frequency property NOTset\n"); + return -EINVAL; + } + port->uartclk = val; + + if (of_property_read_u32(np, "current-speed", &val)) { + dev_err(&pdev->dev, "current-speed property NOT set\n"); + return -EINVAL; + } + uart->baud = val; + + port->membase = of_iomap(np, 0); + if (!port->membase) + /* No point of dev_err since UART itself is hosed here */ + return -ENXIO; + + port->irq = irq_of_parse_and_map(np, 0); - rc = uart_add_one_port(&arc_uart_driver, &arc_uart_ports[dev_id].port); - return rc; + port->dev = &pdev->dev; + port->iotype = UPIO_MEM; + port->flags = UPF_BOOT_AUTOCONF; + port->line = dev_id; + port->ops = &arc_serial_pops; + + port->fifosize = ARC_UART_TX_FIFO_SIZE; + + /* + * uart_insert_char( ) uses it in decideding whether to ignore a + * char or not. Explicitly setting it here, removes the subtelty + */ + port->ignore_status_mask = 0; + + return uart_add_one_port(&arc_uart_driver, &arc_uart_ports[dev_id].port); } static int arc_serial_remove(struct platform_device *pdev) @@ -732,27 +658,6 @@ static struct platform_driver arc_platform_driver = { }, }; -#ifdef CONFIG_SERIAL_ARC_CONSOLE - -static struct platform_driver early_arc_platform_driver __initdata = { - .probe = arc_serial_probe_earlyprintk, - .remove = arc_serial_remove, - .driver = { - .name = DRIVER_NAME, - .owner = THIS_MODULE, - }, -}; -/* - * Register an early platform driver of "earlyprintk" class. - * ARCH platform code installs the driver and probes the early devices - * The installation could rely on user specifying earlyprintk=xyx in cmd line - * or it could be done independently, for all "earlyprintk" class drivers. - * [see arch/arc/plat-arcfpga/platform.c] - */ -early_platform_init("earlyprintk", &early_arc_platform_driver); - -#endif /* CONFIG_SERIAL_ARC_CONSOLE */ - static int __init arc_serial_init(void) { int ret; diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index c4f750314100..7b63677475c1 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -706,7 +706,7 @@ static void atmel_release_tx_dma(struct uart_port *port) dmaengine_terminate_all(chan); dma_release_channel(chan); dma_unmap_sg(port->dev, &atmel_port->sg_tx, 1, - DMA_MEM_TO_DEV); + DMA_TO_DEVICE); } atmel_port->desc_tx = NULL; @@ -804,7 +804,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port) nent = dma_map_sg(port->dev, &atmel_port->sg_tx, 1, - DMA_MEM_TO_DEV); + DMA_TO_DEVICE); if (!nent) { dev_dbg(port->dev, "need to release resource of dma\n"); @@ -883,7 +883,7 @@ static void atmel_release_rx_dma(struct uart_port *port) dmaengine_terminate_all(chan); dma_release_channel(chan); dma_unmap_sg(port->dev, &atmel_port->sg_rx, 1, - DMA_DEV_TO_MEM); + DMA_FROM_DEVICE); } atmel_port->desc_rx = NULL; @@ -968,7 +968,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port) nent = dma_map_sg(port->dev, &atmel_port->sg_rx, 1, - DMA_DEV_TO_MEM); + DMA_FROM_DEVICE); if (!nent) { dev_dbg(port->dev, "need to release resource of dma\n"); diff --git a/drivers/tty/serial/bfin_sport_uart.c b/drivers/tty/serial/bfin_sport_uart.c index 4f229703328b..7810aa290edf 100644 --- a/drivers/tty/serial/bfin_sport_uart.c +++ b/drivers/tty/serial/bfin_sport_uart.c @@ -426,11 +426,6 @@ static void sport_stop_rx(struct uart_port *port) SSYNC(); } -static void sport_enable_ms(struct uart_port *port) -{ - pr_debug("%s enter\n", __func__); -} - static void sport_break_ctl(struct uart_port *port, int break_state) { pr_debug("%s enter\n", __func__); @@ -500,6 +495,13 @@ static void sport_set_termios(struct uart_port *port, pr_debug("%s enter, c_cflag:%08x\n", __func__, termios->c_cflag); +#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS + if (old == NULL && up->cts_pin != -1) + termios->c_cflag |= CRTSCTS; + else if (up->cts_pin == -1) + termios->c_cflag &= ~CRTSCTS; +#endif + switch (termios->c_cflag & CSIZE) { case CS8: up->csize = 8; @@ -587,7 +589,6 @@ struct uart_ops sport_uart_ops = { .stop_tx = sport_stop_tx, .start_tx = sport_start_tx, .stop_rx = sport_stop_rx, - .enable_ms = sport_enable_ms, .break_ctl = sport_break_ctl, .startup = sport_startup, .shutdown = sport_shutdown, @@ -813,10 +814,8 @@ static int sport_uart_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (res == NULL) sport->cts_pin = -1; - else { + else sport->cts_pin = res->start; - sport->port.flags |= ASYNC_CTS_FLOW; - } res = platform_get_resource(pdev, IORESOURCE_IO, 1); if (res == NULL) diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index ac86a20992e9..dec0fd725d80 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -200,14 +200,6 @@ static void bfin_serial_stop_rx(struct uart_port *port) UART_CLEAR_IER(uart, ERBFI); } -/* - * Set the modem control timer to fire immediately. - */ -static void bfin_serial_enable_ms(struct uart_port *port) -{ -} - - #if ANOMALY_05000363 && defined(CONFIG_SERIAL_BFIN_PIO) # define UART_GET_ANOMALY_THRESHOLD(uart) ((uart)->anomaly_threshold) # define UART_SET_ANOMALY_THRESHOLD(uart, v) ((uart)->anomaly_threshold = (v)) @@ -793,6 +785,13 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios, unsigned int ier, lcr = 0; unsigned long timeout; +#ifdef CONFIG_SERIAL_BFIN_CTSRTS + if (old == NULL && uart->cts_pin != -1) + termios->c_cflag |= CRTSCTS; + else if (uart->cts_pin == -1) + termios->c_cflag &= ~CRTSCTS; +#endif + switch (termios->c_cflag & CSIZE) { case CS8: lcr = WLS(8); @@ -1014,7 +1013,6 @@ static struct uart_ops bfin_serial_pops = { .stop_tx = bfin_serial_stop_tx, .start_tx = bfin_serial_start_tx, .stop_rx = bfin_serial_stop_rx, - .enable_ms = bfin_serial_enable_ms, .break_ctl = bfin_serial_break_ctl, .startup = bfin_serial_startup, .shutdown = bfin_serial_shutdown, @@ -1325,12 +1323,8 @@ static int bfin_serial_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (res == NULL) uart->cts_pin = -1; - else { + else uart->cts_pin = res->start; -#ifdef CONFIG_SERIAL_BFIN_CTSRTS - uart->port.flags |= ASYNC_CTS_FLOW; -#endif - } res = platform_get_resource(pdev, IORESOURCE_IO, 1); if (res == NULL) diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index 14aaea0d4131..f5b4c3d7e38f 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -352,7 +352,6 @@ static const struct uart_ops uart_clps711x_ops = { .stop_tx = uart_clps711x_stop_tx, .start_tx = uart_clps711x_start_tx, .stop_rx = uart_clps711x_nop_void, - .enable_ms = uart_clps711x_nop_void, .break_ctl = uart_clps711x_break_ctl, .set_ldisc = uart_clps711x_set_ldisc, .startup = uart_clps711x_startup, diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index aa60e6d13eca..533852eb8778 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -202,14 +202,6 @@ static void cpm_uart_stop_rx(struct uart_port *port) } /* - * Enable Modem status interrupts - */ -static void cpm_uart_enable_ms(struct uart_port *port) -{ - pr_debug("CPM uart[%d]:enable ms\n", port->line); -} - -/* * Generate a break. */ static void cpm_uart_break_ctl(struct uart_port *port, int break_state) @@ -1122,7 +1114,6 @@ static struct uart_ops cpm_uart_pops = { .stop_tx = cpm_uart_stop_tx, .start_tx = cpm_uart_start_tx, .stop_rx = cpm_uart_stop_rx, - .enable_ms = cpm_uart_enable_ms, .break_ctl = cpm_uart_break_ctl, .startup = cpm_uart_startup, .shutdown = cpm_uart_shutdown, diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index d567ac5d3af4..58e6f61a87e4 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -3831,14 +3831,13 @@ block_til_ready(struct tty_struct *tty, struct file * filp, DECLARE_WAITQUEUE(wait, current); unsigned long flags; int retval; - int do_clocal = 0, extra_count = 0; + int do_clocal = 0; /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ - if (tty_hung_up_p(filp) || - (info->port.flags & ASYNC_CLOSING)) { + if (info->port.flags & ASYNC_CLOSING) { wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART @@ -3879,10 +3878,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, info->line, info->port.count); #endif local_irq_save(flags); - if (!tty_hung_up_p(filp)) { - extra_count++; - info->port.count--; - } + info->port.count--; local_irq_restore(flags); info->port.blocked_open++; while (1) { @@ -3921,7 +3917,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, } set_current_state(TASK_RUNNING); remove_wait_queue(&info->port.open_wait, &wait); - if (extra_count) + if (!tty_hung_up_p(filp)) info->port.count++; info->port.blocked_open--; #ifdef SERIAL_DEBUG_OPEN @@ -3976,8 +3972,7 @@ rs_open(struct tty_struct *tty, struct file * filp) /* * If the port is in the middle of closing, bail out now */ - if (tty_hung_up_p(filp) || - (info->port.flags & ASYNC_CLOSING)) { + if (info->port.flags & ASYNC_CLOSING) { wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c index cdbbc788230a..c121f16a973f 100644 --- a/drivers/tty/serial/dz.c +++ b/drivers/tty/serial/dz.c @@ -151,11 +151,6 @@ static void dz_stop_rx(struct uart_port *uport) dz_out(dport, DZ_LPR, dport->cflag); } -static void dz_enable_ms(struct uart_port *uport) -{ - /* nothing to do */ -} - /* * ------------------------------------------------------------ * @@ -751,7 +746,6 @@ static struct uart_ops dz_ops = { .stop_tx = dz_stop_tx, .start_tx = dz_start_tx, .stop_rx = dz_stop_rx, - .enable_ms = dz_enable_ms, .break_ctl = dz_break_ctl, .startup = dz_startup, .shutdown = dz_shutdown, diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c index 3b0ee9afd76f..55d9c00112cc 100644 --- a/drivers/tty/serial/efm32-uart.c +++ b/drivers/tty/serial/efm32-uart.c @@ -185,11 +185,6 @@ static void efm32_uart_stop_rx(struct uart_port *port) efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD); } -static void efm32_uart_enable_ms(struct uart_port *port) -{ - /* no handshake lines, no modem status interrupts */ -} - static void efm32_uart_break_ctl(struct uart_port *port, int ctl) { /* not possible without fiddling with gpios */ @@ -499,7 +494,6 @@ static struct uart_ops efm32_uart_pops = { .stop_tx = efm32_uart_stop_tx, .start_tx = efm32_uart_start_tx, .stop_rx = efm32_uart_stop_rx, - .enable_ms = efm32_uart_enable_ms, .break_ctl = efm32_uart_break_ctl, .startup = efm32_uart_startup, .shutdown = efm32_uart_shutdown, @@ -671,10 +665,16 @@ static int efm32_uart_probe_dt(struct platform_device *pdev, if (!np) return 1; - ret = of_property_read_u32(np, "efm32,location", &location); + ret = of_property_read_u32(np, "energymicro,location", &location); + + if (ret) + /* fall back to wrongly namespaced property */ + ret = of_property_read_u32(np, "efm32,location", &location); + if (ret) /* fall back to old and (wrongly) generic property "location" */ ret = of_property_read_u32(np, "location", &location); + if (!ret) { if (location > 5) { dev_err(&pdev->dev, "invalid location\n"); diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 49385c86cfba..6dd53af546a3 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1,7 +1,7 @@ /* * Freescale lpuart serial port driver * - * Copyright 2012-2013 Freescale Semiconductor, Inc. + * Copyright 2012-2014 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -117,8 +117,113 @@ #define UARTSFIFO_TXOF 0x02 #define UARTSFIFO_RXUF 0x01 -#define DMA_MAXBURST 16 -#define DMA_MAXBURST_MASK (DMA_MAXBURST - 1) +/* 32-bit register defination */ +#define UARTBAUD 0x00 +#define UARTSTAT 0x04 +#define UARTCTRL 0x08 +#define UARTDATA 0x0C +#define UARTMATCH 0x10 +#define UARTMODIR 0x14 +#define UARTFIFO 0x18 +#define UARTWATER 0x1c + +#define UARTBAUD_MAEN1 0x80000000 +#define UARTBAUD_MAEN2 0x40000000 +#define UARTBAUD_M10 0x20000000 +#define UARTBAUD_TDMAE 0x00800000 +#define UARTBAUD_RDMAE 0x00200000 +#define UARTBAUD_MATCFG 0x00400000 +#define UARTBAUD_BOTHEDGE 0x00020000 +#define UARTBAUD_RESYNCDIS 0x00010000 +#define UARTBAUD_LBKDIE 0x00008000 +#define UARTBAUD_RXEDGIE 0x00004000 +#define UARTBAUD_SBNS 0x00002000 +#define UARTBAUD_SBR 0x00000000 +#define UARTBAUD_SBR_MASK 0x1fff + +#define UARTSTAT_LBKDIF 0x80000000 +#define UARTSTAT_RXEDGIF 0x40000000 +#define UARTSTAT_MSBF 0x20000000 +#define UARTSTAT_RXINV 0x10000000 +#define UARTSTAT_RWUID 0x08000000 +#define UARTSTAT_BRK13 0x04000000 +#define UARTSTAT_LBKDE 0x02000000 +#define UARTSTAT_RAF 0x01000000 +#define UARTSTAT_TDRE 0x00800000 +#define UARTSTAT_TC 0x00400000 +#define UARTSTAT_RDRF 0x00200000 +#define UARTSTAT_IDLE 0x00100000 +#define UARTSTAT_OR 0x00080000 +#define UARTSTAT_NF 0x00040000 +#define UARTSTAT_FE 0x00020000 +#define UARTSTAT_PE 0x00010000 +#define UARTSTAT_MA1F 0x00008000 +#define UARTSTAT_M21F 0x00004000 + +#define UARTCTRL_R8T9 0x80000000 +#define UARTCTRL_R9T8 0x40000000 +#define UARTCTRL_TXDIR 0x20000000 +#define UARTCTRL_TXINV 0x10000000 +#define UARTCTRL_ORIE 0x08000000 +#define UARTCTRL_NEIE 0x04000000 +#define UARTCTRL_FEIE 0x02000000 +#define UARTCTRL_PEIE 0x01000000 +#define UARTCTRL_TIE 0x00800000 +#define UARTCTRL_TCIE 0x00400000 +#define UARTCTRL_RIE 0x00200000 +#define UARTCTRL_ILIE 0x00100000 +#define UARTCTRL_TE 0x00080000 +#define UARTCTRL_RE 0x00040000 +#define UARTCTRL_RWU 0x00020000 +#define UARTCTRL_SBK 0x00010000 +#define UARTCTRL_MA1IE 0x00008000 +#define UARTCTRL_MA2IE 0x00004000 +#define UARTCTRL_IDLECFG 0x00000100 +#define UARTCTRL_LOOPS 0x00000080 +#define UARTCTRL_DOZEEN 0x00000040 +#define UARTCTRL_RSRC 0x00000020 +#define UARTCTRL_M 0x00000010 +#define UARTCTRL_WAKE 0x00000008 +#define UARTCTRL_ILT 0x00000004 +#define UARTCTRL_PE 0x00000002 +#define UARTCTRL_PT 0x00000001 + +#define UARTDATA_NOISY 0x00008000 +#define UARTDATA_PARITYE 0x00004000 +#define UARTDATA_FRETSC 0x00002000 +#define UARTDATA_RXEMPT 0x00001000 +#define UARTDATA_IDLINE 0x00000800 +#define UARTDATA_MASK 0x3ff + +#define UARTMODIR_IREN 0x00020000 +#define UARTMODIR_TXCTSSRC 0x00000020 +#define UARTMODIR_TXCTSC 0x00000010 +#define UARTMODIR_RXRTSE 0x00000008 +#define UARTMODIR_TXRTSPOL 0x00000004 +#define UARTMODIR_TXRTSE 0x00000002 +#define UARTMODIR_TXCTSE 0x00000001 + +#define UARTFIFO_TXEMPT 0x00800000 +#define UARTFIFO_RXEMPT 0x00400000 +#define UARTFIFO_TXOF 0x00020000 +#define UARTFIFO_RXUF 0x00010000 +#define UARTFIFO_TXFLUSH 0x00008000 +#define UARTFIFO_RXFLUSH 0x00004000 +#define UARTFIFO_TXOFE 0x00000200 +#define UARTFIFO_RXUFE 0x00000100 +#define UARTFIFO_TXFE 0x00000080 +#define UARTFIFO_FIFOSIZE_MASK 0x7 +#define UARTFIFO_TXSIZE_OFF 4 +#define UARTFIFO_RXFE 0x00000008 +#define UARTFIFO_RXSIZE_OFF 0 + +#define UARTWATER_COUNT_MASK 0xff +#define UARTWATER_TXCNT_OFF 8 +#define UARTWATER_RXCNT_OFF 24 +#define UARTWATER_WATER_MASK 0xff +#define UARTWATER_TXWATER_OFF 0 +#define UARTWATER_RXWATER_OFF 16 + #define FSL_UART_RX_DMA_BUFFER_SIZE 64 #define DRIVER_NAME "fsl-lpuart" @@ -130,6 +235,7 @@ struct lpuart_port { struct clk *clk; unsigned int txfifo_size; unsigned int rxfifo_size; + bool lpuart32; bool lpuart_dma_use; struct dma_chan *dma_tx_chan; @@ -154,6 +260,9 @@ static struct of_device_id lpuart_dt_ids[] = { { .compatible = "fsl,vf610-lpuart", }, + { + .compatible = "fsl,ls1021a-lpuart", + }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, lpuart_dt_ids); @@ -162,6 +271,16 @@ MODULE_DEVICE_TABLE(of, lpuart_dt_ids); static void lpuart_dma_tx_complete(void *arg); static void lpuart_dma_rx_complete(void *arg); +static u32 lpuart32_read(void __iomem *addr) +{ + return ioread32be(addr); +} + +static void lpuart32_write(u32 val, void __iomem *addr) +{ + iowrite32be(val, addr); +} + static void lpuart_stop_tx(struct uart_port *port) { unsigned char temp; @@ -171,6 +290,15 @@ static void lpuart_stop_tx(struct uart_port *port) writeb(temp, port->membase + UARTCR2); } +static void lpuart32_stop_tx(struct uart_port *port) +{ + unsigned long temp; + + temp = lpuart32_read(port->membase + UARTCTRL); + temp &= ~(UARTCTRL_TIE | UARTCTRL_TCIE); + lpuart32_write(temp, port->membase + UARTCTRL); +} + static void lpuart_stop_rx(struct uart_port *port) { unsigned char temp; @@ -179,8 +307,12 @@ static void lpuart_stop_rx(struct uart_port *port) writeb(temp & ~UARTCR2_RE, port->membase + UARTCR2); } -static void lpuart_enable_ms(struct uart_port *port) +static void lpuart32_stop_rx(struct uart_port *port) { + unsigned long temp; + + temp = lpuart32_read(port->membase + UARTCTRL); + lpuart32_write(temp & ~UARTCTRL_RE, port->membase + UARTCTRL); } static void lpuart_copy_rx_to_tty(struct lpuart_port *sport, @@ -240,7 +372,7 @@ static int lpuart_dma_tx(struct lpuart_port *sport, unsigned long count) dma_sync_single_for_device(sport->port.dev, sport->dma_tx_buf_bus, UART_XMIT_SIZE, DMA_TO_DEVICE); - sport->dma_tx_bytes = count & ~(DMA_MAXBURST_MASK); + sport->dma_tx_bytes = count & ~(sport->txfifo_size - 1); tx_bus_addr = sport->dma_tx_buf_bus + xmit->tail; sport->dma_tx_desc = dmaengine_prep_slave_single(sport->dma_tx_chan, tx_bus_addr, sport->dma_tx_bytes, @@ -269,7 +401,7 @@ static void lpuart_prepare_tx(struct lpuart_port *sport) if (!count) return; - if (count < DMA_MAXBURST) + if (count < sport->txfifo_size) writeb(readb(sport->port.membase + UARTCR5) & ~UARTCR5_TDMAS, sport->port.membase + UARTCR5); else { @@ -405,6 +537,30 @@ static inline void lpuart_transmit_buffer(struct lpuart_port *sport) lpuart_stop_tx(&sport->port); } +static inline void lpuart32_transmit_buffer(struct lpuart_port *sport) +{ + struct circ_buf *xmit = &sport->port.state->xmit; + unsigned long txcnt; + + txcnt = lpuart32_read(sport->port.membase + UARTWATER); + txcnt = txcnt >> UARTWATER_TXCNT_OFF; + txcnt &= UARTWATER_COUNT_MASK; + while (!uart_circ_empty(xmit) && (txcnt < sport->txfifo_size)) { + lpuart32_write(xmit->buf[xmit->tail], sport->port.membase + UARTDATA); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + sport->port.icount.tx++; + txcnt = lpuart32_read(sport->port.membase + UARTWATER); + txcnt = txcnt >> UARTWATER_TXCNT_OFF; + txcnt &= UARTWATER_COUNT_MASK; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&sport->port); + + if (uart_circ_empty(xmit)) + lpuart32_stop_tx(&sport->port); +} + static void lpuart_start_tx(struct uart_port *port) { struct lpuart_port *sport = container_of(port, @@ -424,6 +580,18 @@ static void lpuart_start_tx(struct uart_port *port) } } +static void lpuart32_start_tx(struct uart_port *port) +{ + struct lpuart_port *sport = container_of(port, struct lpuart_port, port); + unsigned long temp; + + temp = lpuart32_read(port->membase + UARTCTRL); + lpuart32_write(temp | UARTCTRL_TIE, port->membase + UARTCTRL); + + if (lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TDRE) + lpuart32_transmit_buffer(sport); +} + static irqreturn_t lpuart_txint(int irq, void *dev_id) { struct lpuart_port *sport = dev_id; @@ -432,16 +600,25 @@ static irqreturn_t lpuart_txint(int irq, void *dev_id) spin_lock_irqsave(&sport->port.lock, flags); if (sport->port.x_char) { - writeb(sport->port.x_char, sport->port.membase + UARTDR); + if (sport->lpuart32) + lpuart32_write(sport->port.x_char, sport->port.membase + UARTDATA); + else + writeb(sport->port.x_char, sport->port.membase + UARTDR); goto out; } if (uart_circ_empty(xmit) || uart_tx_stopped(&sport->port)) { - lpuart_stop_tx(&sport->port); + if (sport->lpuart32) + lpuart32_stop_tx(&sport->port); + else + lpuart_stop_tx(&sport->port); goto out; } - lpuart_transmit_buffer(sport); + if (sport->lpuart32) + lpuart32_transmit_buffer(sport); + else + lpuart_transmit_buffer(sport); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(&sport->port); @@ -514,6 +691,70 @@ out: return IRQ_HANDLED; } +static irqreturn_t lpuart32_rxint(int irq, void *dev_id) +{ + struct lpuart_port *sport = dev_id; + unsigned int flg, ignored = 0; + struct tty_port *port = &sport->port.state->port; + unsigned long flags; + unsigned long rx, sr; + + spin_lock_irqsave(&sport->port.lock, flags); + + while (!(lpuart32_read(sport->port.membase + UARTFIFO) & UARTFIFO_RXEMPT)) { + flg = TTY_NORMAL; + sport->port.icount.rx++; + /* + * to clear the FE, OR, NF, FE, PE flags, + * read STAT then read DATA reg + */ + sr = lpuart32_read(sport->port.membase + UARTSTAT); + rx = lpuart32_read(sport->port.membase + UARTDATA); + rx &= 0x3ff; + + if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx)) + continue; + + if (sr & (UARTSTAT_PE | UARTSTAT_OR | UARTSTAT_FE)) { + if (sr & UARTSTAT_PE) + sport->port.icount.parity++; + else if (sr & UARTSTAT_FE) + sport->port.icount.frame++; + + if (sr & UARTSTAT_OR) + sport->port.icount.overrun++; + + if (sr & sport->port.ignore_status_mask) { + if (++ignored > 100) + goto out; + continue; + } + + sr &= sport->port.read_status_mask; + + if (sr & UARTSTAT_PE) + flg = TTY_PARITY; + else if (sr & UARTSTAT_FE) + flg = TTY_FRAME; + + if (sr & UARTSTAT_OR) + flg = TTY_OVERRUN; + +#ifdef SUPPORT_SYSRQ + sport->port.sysrq = 0; +#endif + } + + tty_insert_flip_char(port, rx, flg); + } + +out: + spin_unlock_irqrestore(&sport->port.lock, flags); + + tty_flip_buffer_push(port); + return IRQ_HANDLED; +} + static irqreturn_t lpuart_int(int irq, void *dev_id) { struct lpuart_port *sport = dev_id; @@ -538,6 +779,26 @@ static irqreturn_t lpuart_int(int irq, void *dev_id) return IRQ_HANDLED; } +static irqreturn_t lpuart32_int(int irq, void *dev_id) +{ + struct lpuart_port *sport = dev_id; + unsigned long sts, rxcount; + + sts = lpuart32_read(sport->port.membase + UARTSTAT); + rxcount = lpuart32_read(sport->port.membase + UARTWATER); + rxcount = rxcount >> UARTWATER_RXCNT_OFF; + + if (sts & UARTSTAT_RDRF || rxcount > 0) + lpuart32_rxint(irq, dev_id); + + if ((sts & UARTSTAT_TDRE) && + !(lpuart32_read(sport->port.membase + UARTBAUD) & UARTBAUD_TDMAE)) + lpuart_txint(irq, dev_id); + + lpuart32_write(sts, sport->port.membase + UARTSTAT); + return IRQ_HANDLED; +} + /* return TIOCSER_TEMT when transmitter is not busy */ static unsigned int lpuart_tx_empty(struct uart_port *port) { @@ -545,6 +806,12 @@ static unsigned int lpuart_tx_empty(struct uart_port *port) TIOCSER_TEMT : 0; } +static unsigned int lpuart32_tx_empty(struct uart_port *port) +{ + return (lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TC) ? + TIOCSER_TEMT : 0; +} + static unsigned int lpuart_get_mctrl(struct uart_port *port) { unsigned int temp = 0; @@ -560,6 +827,21 @@ static unsigned int lpuart_get_mctrl(struct uart_port *port) return temp; } +static unsigned int lpuart32_get_mctrl(struct uart_port *port) +{ + unsigned int temp = 0; + unsigned long reg; + + reg = lpuart32_read(port->membase + UARTMODIR); + if (reg & UARTMODIR_TXCTSE) + temp |= TIOCM_CTS; + + if (reg & UARTMODIR_RXRTSE) + temp |= TIOCM_RTS; + + return temp; +} + static void lpuart_set_mctrl(struct uart_port *port, unsigned int mctrl) { unsigned char temp; @@ -576,6 +858,22 @@ static void lpuart_set_mctrl(struct uart_port *port, unsigned int mctrl) writeb(temp, port->membase + UARTMODEM); } +static void lpuart32_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + unsigned long temp; + + temp = lpuart32_read(port->membase + UARTMODIR) & + ~(UARTMODIR_RXRTSE | UARTMODIR_TXCTSE); + + if (mctrl & TIOCM_RTS) + temp |= UARTMODIR_RXRTSE; + + if (mctrl & TIOCM_CTS) + temp |= UARTMODIR_TXCTSE; + + lpuart32_write(temp, port->membase + UARTMODIR); +} + static void lpuart_break_ctl(struct uart_port *port, int break_state) { unsigned char temp; @@ -588,6 +886,18 @@ static void lpuart_break_ctl(struct uart_port *port, int break_state) writeb(temp, port->membase + UARTCR2); } +static void lpuart32_break_ctl(struct uart_port *port, int break_state) +{ + unsigned long temp; + + temp = lpuart32_read(port->membase + UARTCTRL) & ~UARTCTRL_SBK; + + if (break_state != 0) + temp |= UARTCTRL_SBK; + + lpuart32_write(temp, port->membase + UARTCTRL); +} + static void lpuart_setup_watermark(struct lpuart_port *sport) { unsigned char val, cr2; @@ -599,15 +909,7 @@ static void lpuart_setup_watermark(struct lpuart_port *sport) UARTCR2_RIE | UARTCR2_RE); writeb(cr2, sport->port.membase + UARTCR2); - /* determine FIFO size and enable FIFO mode */ val = readb(sport->port.membase + UARTPFIFO); - - sport->txfifo_size = 0x1 << (((val >> UARTPFIFO_TXSIZE_OFF) & - UARTPFIFO_FIFOSIZE_MASK) + 1); - - sport->rxfifo_size = 0x1 << (((val >> UARTPFIFO_RXSIZE_OFF) & - UARTPFIFO_FIFOSIZE_MASK) + 1); - writeb(val | UARTPFIFO_TXFE | UARTPFIFO_RXFE, sport->port.membase + UARTPFIFO); @@ -622,6 +924,31 @@ static void lpuart_setup_watermark(struct lpuart_port *sport) writeb(cr2_saved, sport->port.membase + UARTCR2); } +static void lpuart32_setup_watermark(struct lpuart_port *sport) +{ + unsigned long val, ctrl; + unsigned long ctrl_saved; + + ctrl = lpuart32_read(sport->port.membase + UARTCTRL); + ctrl_saved = ctrl; + ctrl &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_TE | + UARTCTRL_RIE | UARTCTRL_RE); + lpuart32_write(ctrl, sport->port.membase + UARTCTRL); + + /* enable FIFO mode */ + val = lpuart32_read(sport->port.membase + UARTFIFO); + val |= UARTFIFO_TXFE | UARTFIFO_RXFE; + val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH; + lpuart32_write(val, sport->port.membase + UARTFIFO); + + /* set the watermark */ + val = (0x1 << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF); + lpuart32_write(val, sport->port.membase + UARTWATER); + + /* Restore cr2 */ + lpuart32_write(ctrl_saved, sport->port.membase + UARTCTRL); +} + static int lpuart_dma_tx_request(struct uart_port *port) { struct lpuart_port *sport = container_of(port, @@ -652,7 +979,7 @@ static int lpuart_dma_tx_request(struct uart_port *port) dma_buf = sport->port.state->xmit.buf; dma_tx_sconfig.dst_addr = sport->port.mapbase + UARTDR; dma_tx_sconfig.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; - dma_tx_sconfig.dst_maxburst = DMA_MAXBURST; + dma_tx_sconfig.dst_maxburst = sport->txfifo_size; dma_tx_sconfig.direction = DMA_MEM_TO_DEV; ret = dmaengine_slave_config(tx_chan, &dma_tx_sconfig); @@ -724,13 +1051,6 @@ static int lpuart_dma_rx_request(struct uart_port *port) sport->dma_rx_buf_bus = dma_bus; sport->dma_rx_in_progress = 0; - sport->dma_rx_timeout = (sport->port.timeout - HZ / 50) * - FSL_UART_RX_DMA_BUFFER_SIZE * 3 / - sport->rxfifo_size / 2; - - if (sport->dma_rx_timeout < msecs_to_jiffies(20)) - sport->dma_rx_timeout = msecs_to_jiffies(20); - return 0; } @@ -772,7 +1092,16 @@ static int lpuart_startup(struct uart_port *port) unsigned long flags; unsigned char temp; - /*whether use dma support by dma request results*/ + /* determine FIFO size and enable FIFO mode */ + temp = readb(sport->port.membase + UARTPFIFO); + + sport->txfifo_size = 0x1 << (((temp >> UARTPFIFO_TXSIZE_OFF) & + UARTPFIFO_FIFOSIZE_MASK) + 1); + + sport->rxfifo_size = 0x1 << (((temp >> UARTPFIFO_RXSIZE_OFF) & + UARTPFIFO_FIFOSIZE_MASK) + 1); + + /* Whether use dma support by dma request results */ if (lpuart_dma_tx_request(port) || lpuart_dma_rx_request(port)) { sport->lpuart_dma_use = false; } else { @@ -798,6 +1127,40 @@ static int lpuart_startup(struct uart_port *port) return 0; } +static int lpuart32_startup(struct uart_port *port) +{ + struct lpuart_port *sport = container_of(port, struct lpuart_port, port); + int ret; + unsigned long flags; + unsigned long temp; + + /* determine FIFO size */ + temp = lpuart32_read(sport->port.membase + UARTFIFO); + + sport->txfifo_size = 0x1 << (((temp >> UARTFIFO_TXSIZE_OFF) & + UARTFIFO_FIFOSIZE_MASK) - 1); + + sport->rxfifo_size = 0x1 << (((temp >> UARTFIFO_RXSIZE_OFF) & + UARTFIFO_FIFOSIZE_MASK) - 1); + + ret = devm_request_irq(port->dev, port->irq, lpuart32_int, 0, + DRIVER_NAME, sport); + if (ret) + return ret; + + spin_lock_irqsave(&sport->port.lock, flags); + + lpuart32_setup_watermark(sport); + + temp = lpuart32_read(sport->port.membase + UARTCTRL); + temp |= (UARTCTRL_RIE | UARTCTRL_TIE | UARTCTRL_RE | UARTCTRL_TE); + temp |= UARTCTRL_ILIE; + lpuart32_write(temp, sport->port.membase + UARTCTRL); + + spin_unlock_irqrestore(&sport->port.lock, flags); + return 0; +} + static void lpuart_shutdown(struct uart_port *port) { struct lpuart_port *sport = container_of(port, struct lpuart_port, port); @@ -822,6 +1185,25 @@ static void lpuart_shutdown(struct uart_port *port) } } +static void lpuart32_shutdown(struct uart_port *port) +{ + struct lpuart_port *sport = container_of(port, struct lpuart_port, port); + unsigned long temp; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + /* disable Rx/Tx and interrupts */ + temp = lpuart32_read(port->membase + UARTCTRL); + temp &= ~(UARTCTRL_TE | UARTCTRL_RE | + UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE); + lpuart32_write(temp, port->membase + UARTCTRL); + + spin_unlock_irqrestore(&port->lock, flags); + + devm_free_irq(port->dev, port->irq, sport); +} + static void lpuart_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) @@ -922,6 +1304,17 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios, /* update the per-port timeout */ uart_update_timeout(port, termios->c_cflag, baud); + if (sport->lpuart_dma_use) { + /* Calculate delay for 1.5 DMA buffers */ + sport->dma_rx_timeout = (sport->port.timeout - HZ / 50) * + FSL_UART_RX_DMA_BUFFER_SIZE * 3 / + sport->rxfifo_size / 2; + dev_dbg(port->dev, "DMA Rx t-out %ums, tty t-out %u jiffies\n", + sport->dma_rx_timeout * 1000 / HZ, sport->port.timeout); + if (sport->dma_rx_timeout < msecs_to_jiffies(20)) + sport->dma_rx_timeout = msecs_to_jiffies(20); + } + /* wait transmit engin complete */ while (!(readb(sport->port.membase + UARTSR1) & UARTSR1_TC)) barrier(); @@ -948,6 +1341,125 @@ lpuart_set_termios(struct uart_port *port, struct ktermios *termios, spin_unlock_irqrestore(&sport->port.lock, flags); } +static void +lpuart32_set_termios(struct uart_port *port, struct ktermios *termios, + struct ktermios *old) +{ + struct lpuart_port *sport = container_of(port, struct lpuart_port, port); + unsigned long flags; + unsigned long ctrl, old_ctrl, bd, modem; + unsigned int baud; + unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8; + unsigned int sbr; + + ctrl = old_ctrl = lpuart32_read(sport->port.membase + UARTCTRL); + bd = lpuart32_read(sport->port.membase + UARTBAUD); + modem = lpuart32_read(sport->port.membase + UARTMODIR); + /* + * only support CS8 and CS7, and for CS7 must enable PE. + * supported mode: + * - (7,e/o,1) + * - (8,n,1) + * - (8,m/s,1) + * - (8,e/o,1) + */ + while ((termios->c_cflag & CSIZE) != CS8 && + (termios->c_cflag & CSIZE) != CS7) { + termios->c_cflag &= ~CSIZE; + termios->c_cflag |= old_csize; + old_csize = CS8; + } + + if ((termios->c_cflag & CSIZE) == CS8 || + (termios->c_cflag & CSIZE) == CS7) + ctrl = old_ctrl & ~UARTCTRL_M; + + if (termios->c_cflag & CMSPAR) { + if ((termios->c_cflag & CSIZE) != CS8) { + termios->c_cflag &= ~CSIZE; + termios->c_cflag |= CS8; + } + ctrl |= UARTCTRL_M; + } + + if (termios->c_cflag & CRTSCTS) { + modem |= (UARTMODEM_RXRTSE | UARTMODEM_TXCTSE); + } else { + termios->c_cflag &= ~CRTSCTS; + modem &= ~(UARTMODEM_RXRTSE | UARTMODEM_TXCTSE); + } + + if (termios->c_cflag & CSTOPB) + termios->c_cflag &= ~CSTOPB; + + /* parity must be enabled when CS7 to match 8-bits format */ + if ((termios->c_cflag & CSIZE) == CS7) + termios->c_cflag |= PARENB; + + if ((termios->c_cflag & PARENB)) { + if (termios->c_cflag & CMSPAR) { + ctrl &= ~UARTCTRL_PE; + ctrl |= UARTCTRL_M; + } else { + ctrl |= UARTCR1_PE; + if ((termios->c_cflag & CSIZE) == CS8) + ctrl |= UARTCTRL_M; + if (termios->c_cflag & PARODD) + ctrl |= UARTCTRL_PT; + else + ctrl &= ~UARTCTRL_PT; + } + } + + /* ask the core to calculate the divisor */ + baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16); + + spin_lock_irqsave(&sport->port.lock, flags); + + sport->port.read_status_mask = 0; + if (termios->c_iflag & INPCK) + sport->port.read_status_mask |= (UARTSTAT_FE | UARTSTAT_PE); + if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK)) + sport->port.read_status_mask |= UARTSTAT_FE; + + /* characters to ignore */ + sport->port.ignore_status_mask = 0; + if (termios->c_iflag & IGNPAR) + sport->port.ignore_status_mask |= UARTSTAT_PE; + if (termios->c_iflag & IGNBRK) { + sport->port.ignore_status_mask |= UARTSTAT_FE; + /* + * if we're ignoring parity and break indicators, + * ignore overruns too (for real raw support). + */ + if (termios->c_iflag & IGNPAR) + sport->port.ignore_status_mask |= UARTSTAT_OR; + } + + /* update the per-port timeout */ + uart_update_timeout(port, termios->c_cflag, baud); + + /* wait transmit engin complete */ + while (!(lpuart32_read(sport->port.membase + UARTSTAT) & UARTSTAT_TC)) + barrier(); + + /* disable transmit and receive */ + lpuart32_write(old_ctrl & ~(UARTCTRL_TE | UARTCTRL_RE), + sport->port.membase + UARTCTRL); + + sbr = sport->port.uartclk / (16 * baud); + bd &= ~UARTBAUD_SBR_MASK; + bd |= sbr & UARTBAUD_SBR_MASK; + bd |= UARTBAUD_BOTHEDGE; + bd &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE); + lpuart32_write(bd, sport->port.membase + UARTBAUD); + lpuart32_write(modem, sport->port.membase + UARTMODIR); + lpuart32_write(ctrl, sport->port.membase + UARTCTRL); + /* restore control register */ + + spin_unlock_irqrestore(&sport->port.lock, flags); +} + static const char *lpuart_type(struct uart_port *port) { return "FSL_LPUART"; @@ -996,7 +1508,6 @@ static struct uart_ops lpuart_pops = { .stop_tx = lpuart_stop_tx, .start_tx = lpuart_start_tx, .stop_rx = lpuart_stop_rx, - .enable_ms = lpuart_enable_ms, .break_ctl = lpuart_break_ctl, .startup = lpuart_startup, .shutdown = lpuart_shutdown, @@ -1008,6 +1519,24 @@ static struct uart_ops lpuart_pops = { .verify_port = lpuart_verify_port, }; +static struct uart_ops lpuart32_pops = { + .tx_empty = lpuart32_tx_empty, + .set_mctrl = lpuart32_set_mctrl, + .get_mctrl = lpuart32_get_mctrl, + .stop_tx = lpuart32_stop_tx, + .start_tx = lpuart32_start_tx, + .stop_rx = lpuart32_stop_rx, + .break_ctl = lpuart32_break_ctl, + .startup = lpuart32_startup, + .shutdown = lpuart32_shutdown, + .set_termios = lpuart32_set_termios, + .type = lpuart_type, + .request_port = lpuart_request_port, + .release_port = lpuart_release_port, + .config_port = lpuart_config_port, + .verify_port = lpuart_verify_port, +}; + static struct lpuart_port *lpuart_ports[UART_NR]; #ifdef CONFIG_SERIAL_FSL_LPUART_CONSOLE @@ -1019,6 +1548,14 @@ static void lpuart_console_putchar(struct uart_port *port, int ch) writeb(ch, port->membase + UARTDR); } +static void lpuart32_console_putchar(struct uart_port *port, int ch) +{ + while (!(lpuart32_read(port->membase + UARTSTAT) & UARTSTAT_TDRE)) + barrier(); + + lpuart32_write(ch, port->membase + UARTDATA); +} + static void lpuart_console_write(struct console *co, const char *s, unsigned int count) { @@ -1040,6 +1577,27 @@ lpuart_console_write(struct console *co, const char *s, unsigned int count) writeb(old_cr2, sport->port.membase + UARTCR2); } +static void +lpuart32_console_write(struct console *co, const char *s, unsigned int count) +{ + struct lpuart_port *sport = lpuart_ports[co->index]; + unsigned long old_cr, cr; + + /* first save CR2 and then disable interrupts */ + cr = old_cr = lpuart32_read(sport->port.membase + UARTCTRL); + cr |= (UARTCTRL_TE | UARTCTRL_RE); + cr &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE); + lpuart32_write(cr, sport->port.membase + UARTCTRL); + + uart_console_write(&sport->port, s, count, lpuart32_console_putchar); + + /* wait for transmitter finish complete and restore CR2 */ + while (!(lpuart32_read(sport->port.membase + UARTSTAT) & UARTSTAT_TC)) + barrier(); + + lpuart32_write(old_cr, sport->port.membase + UARTCTRL); +} + /* * if the port was already initialised (eg, by a boot loader), * try to determine the current setup. @@ -1093,6 +1651,49 @@ lpuart_console_get_options(struct lpuart_port *sport, int *baud, "from %d to %d\n", baud_raw, *baud); } +static void __init +lpuart32_console_get_options(struct lpuart_port *sport, int *baud, + int *parity, int *bits) +{ + unsigned long cr, bd; + unsigned int sbr, uartclk, baud_raw; + + cr = lpuart32_read(sport->port.membase + UARTCTRL); + cr &= UARTCTRL_TE | UARTCTRL_RE; + if (!cr) + return; + + /* ok, the port was enabled */ + + cr = lpuart32_read(sport->port.membase + UARTCTRL); + + *parity = 'n'; + if (cr & UARTCTRL_PE) { + if (cr & UARTCTRL_PT) + *parity = 'o'; + else + *parity = 'e'; + } + + if (cr & UARTCTRL_M) + *bits = 9; + else + *bits = 8; + + bd = lpuart32_read(sport->port.membase + UARTBAUD); + bd &= UARTBAUD_SBR_MASK; + sbr = bd; + uartclk = clk_get_rate(sport->clk); + /* + * baud = mod_clk/(16*(sbr[13]+(brfa)/32) + */ + baud_raw = uartclk / (16 * sbr); + + if (*baud != baud_raw) + printk(KERN_INFO "Serial: Console lpuart rounded baud rate" + "from %d to %d\n", baud_raw, *baud); +} + static int __init lpuart_console_setup(struct console *co, char *options) { struct lpuart_port *sport; @@ -1116,9 +1717,15 @@ static int __init lpuart_console_setup(struct console *co, char *options) if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); else - lpuart_console_get_options(sport, &baud, &parity, &bits); + if (sport->lpuart32) + lpuart32_console_get_options(sport, &baud, &parity, &bits); + else + lpuart_console_get_options(sport, &baud, &parity, &bits); - lpuart_setup_watermark(sport); + if (sport->lpuart32) + lpuart32_setup_watermark(sport); + else + lpuart_setup_watermark(sport); return uart_set_options(&sport->port, co, baud, parity, bits, flow); } @@ -1134,9 +1741,21 @@ static struct console lpuart_console = { .data = &lpuart_reg, }; +static struct console lpuart32_console = { + .name = DEV_NAME, + .write = lpuart32_console_write, + .device = uart_console_device, + .setup = lpuart_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &lpuart_reg, +}; + #define LPUART_CONSOLE (&lpuart_console) +#define LPUART32_CONSOLE (&lpuart32_console) #else #define LPUART_CONSOLE NULL +#define LPUART32_CONSOLE NULL #endif static struct uart_driver lpuart_reg = { @@ -1166,7 +1785,7 @@ static int lpuart_probe(struct platform_device *pdev) return ret; } sport->port.line = ret; - + sport->lpuart32 = of_device_is_compatible(np, "fsl,ls1021a-lpuart"); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; @@ -1180,7 +1799,10 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.type = PORT_LPUART; sport->port.iotype = UPIO_MEM; sport->port.irq = platform_get_irq(pdev, 0); - sport->port.ops = &lpuart_pops; + if (sport->lpuart32) + sport->port.ops = &lpuart32_pops; + else + sport->port.ops = &lpuart_pops; sport->port.flags = UPF_BOOT_AUTOCONF; sport->clk = devm_clk_get(&pdev->dev, "ipg"); @@ -1202,6 +1824,11 @@ static int lpuart_probe(struct platform_device *pdev) platform_set_drvdata(pdev, &sport->port); + if (sport->lpuart32) + lpuart_reg.cons = LPUART32_CONSOLE; + else + lpuart_reg.cons = LPUART_CONSOLE; + ret = uart_add_one_port(&lpuart_reg, &sport->port); if (ret) { clk_disable_unprepare(sport->clk); diff --git a/drivers/tty/serial/icom.c b/drivers/tty/serial/icom.c index 67423805e6d9..d4620fe5da2e 100644 --- a/drivers/tty/serial/icom.c +++ b/drivers/tty/serial/icom.c @@ -1052,11 +1052,6 @@ static void icom_stop_rx(struct uart_port *port) writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg); } -static void icom_enable_ms(struct uart_port *port) -{ - /* no-op */ -} - static void icom_break(struct uart_port *port, int break_state) { unsigned char cmdReg; @@ -1300,7 +1295,6 @@ static struct uart_ops icom_ops = { .start_tx = icom_start_tx, .send_xchar = icom_send_xchar, .stop_rx = icom_stop_rx, - .enable_ms = icom_enable_ms, .break_ctl = icom_break, .startup = icom_open, .shutdown = icom_close, diff --git a/drivers/tty/serial/ioc3_serial.c b/drivers/tty/serial/ioc3_serial.c index 6e4c715c5d26..abd7ea26ed9a 100644 --- a/drivers/tty/serial/ioc3_serial.c +++ b/drivers/tty/serial/ioc3_serial.c @@ -1880,7 +1880,6 @@ static struct uart_ops ioc3_ops = { .stop_tx = ic3_stop_tx, .start_tx = ic3_start_tx, .stop_rx = ic3_stop_rx, - .enable_ms = null_void_function, .break_ctl = ic3_break_ctl, .startup = ic3_startup, .shutdown = ic3_shutdown, diff --git a/drivers/tty/serial/ioc4_serial.c b/drivers/tty/serial/ioc4_serial.c index 1274499850fc..aa28209f44c1 100644 --- a/drivers/tty/serial/ioc4_serial.c +++ b/drivers/tty/serial/ioc4_serial.c @@ -2597,7 +2597,6 @@ static struct uart_ops ioc4_ops = { .stop_tx = ic4_stop_tx, .start_tx = ic4_start_tx, .stop_rx = null_void_function, - .enable_ms = null_void_function, .break_ctl = ic4_break_ctl, .startup = ic4_startup, .shutdown = ic4_shutdown, diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c index 27bb75070c96..3e5c1563afe2 100644 --- a/drivers/tty/serial/jsm/jsm_tty.c +++ b/drivers/tty/serial/jsm/jsm_tty.c @@ -177,11 +177,6 @@ static void jsm_tty_stop_rx(struct uart_port *port) channel->ch_bd->bd_ops->disable_receiver(channel); } -static void jsm_tty_enable_ms(struct uart_port *port) -{ - /* Nothing needed */ -} - static void jsm_tty_break(struct uart_port *port, int break_state) { unsigned long lock_flags; @@ -354,7 +349,6 @@ static struct uart_ops jsm_ops = { .start_tx = jsm_tty_start_tx, .send_xchar = jsm_tty_send_xchar, .stop_rx = jsm_tty_stop_rx, - .enable_ms = jsm_tty_enable_ms, .break_ctl = jsm_tty_break, .startup = jsm_tty_open, .shutdown = jsm_tty_close, diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c index cfadf2971b12..6ec7501b464d 100644 --- a/drivers/tty/serial/kgdb_nmi.c +++ b/drivers/tty/serial/kgdb_nmi.c @@ -42,7 +42,7 @@ static char *kgdb_nmi_magic = "$3#33"; module_param_named(magic, kgdb_nmi_magic, charp, 0600); MODULE_PARM_DESC(magic, "magic sequence to enter NMI debugger (default $3#33)"); -static bool kgdb_nmi_tty_enabled; +static atomic_t kgdb_nmi_num_readers = ATOMIC_INIT(0); static int kgdb_nmi_console_setup(struct console *co, char *options) { @@ -136,7 +136,7 @@ static int kgdb_nmi_poll_one_knock(void) n = 0; } - if (kgdb_nmi_tty_enabled) { + if (atomic_read(&kgdb_nmi_num_readers)) { kgdb_tty_recv(c); return 0; } @@ -197,7 +197,8 @@ static void kgdb_nmi_tty_receiver(unsigned long data) priv->timer.expires = jiffies + (HZ/100); add_timer(&priv->timer); - if (likely(!kgdb_nmi_tty_enabled || !kfifo_len(&priv->fifo))) + if (likely(!atomic_read(&kgdb_nmi_num_readers) || + !kfifo_len(&priv->fifo))) return; while (kfifo_out(&priv->fifo, &ch, 1)) @@ -270,13 +271,23 @@ static void kgdb_nmi_tty_cleanup(struct tty_struct *tty) static int kgdb_nmi_tty_open(struct tty_struct *tty, struct file *file) { struct kgdb_nmi_tty_priv *priv = tty->driver_data; + unsigned int mode = file->f_flags & O_ACCMODE; + int ret; + + ret = tty_port_open(&priv->port, tty, file); + if (!ret && (mode == O_RDONLY || mode == O_RDWR)) + atomic_inc(&kgdb_nmi_num_readers); - return tty_port_open(&priv->port, tty, file); + return ret; } static void kgdb_nmi_tty_close(struct tty_struct *tty, struct file *file) { struct kgdb_nmi_tty_priv *priv = tty->driver_data; + unsigned int mode = file->f_flags & O_ACCMODE; + + if (mode == O_RDONLY || mode == O_RDWR) + atomic_dec(&kgdb_nmi_num_readers); tty_port_close(&priv->port, tty, file); } @@ -313,12 +324,6 @@ static const struct tty_operations kgdb_nmi_tty_ops = { .write = kgdb_nmi_tty_write, }; -static int kgdb_nmi_enable_console(int argc, const char *argv[]) -{ - kgdb_nmi_tty_enabled = !(argc == 1 && !strcmp(argv[1], "off")); - return 0; -} - int kgdb_register_nmi_console(void) { int ret; @@ -348,19 +353,10 @@ int kgdb_register_nmi_console(void) goto err_drv_reg; } - ret = kdb_register("nmi_console", kgdb_nmi_enable_console, "[off]", - "switch to Linux NMI console", 0); - if (ret) { - pr_err("%s: can't register kdb command: %d\n", __func__, ret); - goto err_kdb_reg; - } - register_console(&kgdb_nmi_console); arch_kgdb_ops.enable_nmi(1); return 0; -err_kdb_reg: - tty_unregister_driver(kgdb_nmi_tty_driver); err_drv_reg: put_tty_driver(kgdb_nmi_tty_driver); return ret; @@ -375,8 +371,6 @@ int kgdb_unregister_nmi_console(void) return 0; arch_kgdb_ops.enable_nmi(0); - kdb_unregister("nmi_console"); - ret = unregister_console(&kgdb_nmi_console); if (ret) return ret; diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c index 88d01e0bb0c8..4675fe198d31 100644 --- a/drivers/tty/serial/lantiq.c +++ b/drivers/tty/serial/lantiq.c @@ -154,11 +154,6 @@ lqasc_stop_rx(struct uart_port *port) ltq_w32(ASCWHBSTATE_CLRREN, port->membase + LTQ_ASC_WHBSTATE); } -static void -lqasc_enable_ms(struct uart_port *port) -{ -} - static int lqasc_rx_chars(struct uart_port *port) { @@ -568,7 +563,6 @@ static struct uart_ops lqasc_pops = { .stop_tx = lqasc_stop_tx, .start_tx = lqasc_start_tx, .stop_rx = lqasc_stop_rx, - .enable_ms = lqasc_enable_ms, .break_ctl = lqasc_break_ctl, .startup = lqasc_startup, .shutdown = lqasc_shutdown, @@ -709,7 +703,7 @@ lqasc_probe(struct platform_device *pdev) port = <q_port->port; port->iotype = SERIAL_IO_MEM; - port->flags = ASYNC_BOOT_AUTOCONF | UPF_IOREMAP; + port->flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; port->ops = &lqasc_pops; port->fifosize = 16; port->type = PORT_LTQ_ASC, diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c index 701644f06820..6f0f89282847 100644 --- a/drivers/tty/serial/lpc32xx_hs.c +++ b/drivers/tty/serial/lpc32xx_hs.c @@ -427,12 +427,6 @@ static void serial_lpc32xx_stop_rx(struct uart_port *port) LPC32XX_HSU_FE_INT), LPC32XX_HSUART_IIR(port->membase)); } -/* port->lock held by caller. */ -static void serial_lpc32xx_enable_ms(struct uart_port *port) -{ - /* Modem status is not supported */ -} - /* port->lock is not held. */ static void serial_lpc32xx_break_ctl(struct uart_port *port, int break_state) @@ -658,7 +652,6 @@ static struct uart_ops serial_lpc32xx_pops = { .stop_tx = serial_lpc32xx_stop_tx, .start_tx = serial_lpc32xx_start_tx, .stop_rx = serial_lpc32xx_stop_rx, - .enable_ms = serial_lpc32xx_enable_ms, .break_ctl = serial_lpc32xx_break_ctl, .startup = serial_lpc32xx_startup, .shutdown = serial_lpc32xx_shutdown, diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index ba285cd45b59..82573dc4d8cf 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1008,7 +1008,6 @@ static const struct uart_ops max310x_ops = { .stop_tx = max310x_null_void, .start_tx = max310x_start_tx, .stop_rx = max310x_null_void, - .enable_ms = max310x_null_void, .break_ctl = max310x_break_ctl, .startup = max310x_startup, .shutdown = max310x_shutdown, diff --git a/drivers/tty/serial/mcf.c b/drivers/tty/serial/mcf.c index a6f085717f94..bc896dc7d2ed 100644 --- a/drivers/tty/serial/mcf.c +++ b/drivers/tty/serial/mcf.c @@ -150,12 +150,6 @@ static void mcf_break_ctl(struct uart_port *port, int break_state) /****************************************************************************/ -static void mcf_enable_ms(struct uart_port *port) -{ -} - -/****************************************************************************/ - static int mcf_startup(struct uart_port *port) { struct mcf_uart *pp = container_of(port, struct mcf_uart, port); @@ -507,7 +501,6 @@ static const struct uart_ops mcf_uart_ops = { .start_tx = mcf_start_tx, .stop_tx = mcf_stop_tx, .stop_rx = mcf_stop_rx, - .enable_ms = mcf_enable_ms, .break_ctl = mcf_break_ctl, .startup = mcf_startup, .shutdown = mcf_shutdown, @@ -544,7 +537,7 @@ int __init early_mcf_setup(struct mcf_platform_uart *platp) port->iotype = SERIAL_IO_MEM; port->irq = platp[i].irq; port->uartclk = MCF_BUSCLK; - port->flags = ASYNC_BOOT_AUTOCONF; + port->flags = UPF_BOOT_AUTOCONF; port->ops = &mcf_uart_ops; } @@ -669,7 +662,7 @@ static int mcf_probe(struct platform_device *pdev) port->irq = platp[i].irq; port->uartclk = MCF_BUSCLK; port->ops = &mcf_uart_ops; - port->flags = ASYNC_BOOT_AUTOCONF; + port->flags = UPF_BOOT_AUTOCONF; uart_add_one_port(&mcf_driver, port); } diff --git a/drivers/tty/serial/men_z135_uart.c b/drivers/tty/serial/men_z135_uart.c index c9d18548783a..30e9e60bc5cd 100644 --- a/drivers/tty/serial/men_z135_uart.c +++ b/drivers/tty/serial/men_z135_uart.c @@ -308,9 +308,6 @@ static void men_z135_handle_tx(struct men_z135_port *uart) if (port->x_char) goto out; - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); - /* calculate bytes to copy */ qlen = uart_circ_chars_pending(xmit); if (qlen <= 0) @@ -357,6 +354,9 @@ static void men_z135_handle_tx(struct men_z135_port *uart) port->icount.tx += n; + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + irq_en: if (!uart_circ_empty(xmit)) men_z135_reg_set(uart, MEN_Z135_CONF_REG, MEN_Z135_IER_TXCIEN); diff --git a/drivers/tty/serial/mpsc.c b/drivers/tty/serial/mpsc.c index 759c6a6fa74a..ae49856ef6c7 100644 --- a/drivers/tty/serial/mpsc.c +++ b/drivers/tty/serial/mpsc.c @@ -1336,10 +1336,6 @@ static void mpsc_stop_rx(struct uart_port *port) mpsc_sdma_cmd(pi, SDMA_SDCM_AR); } -static void mpsc_enable_ms(struct uart_port *port) -{ -} - static void mpsc_break_ctl(struct uart_port *port, int ctl) { struct mpsc_port_info *pi = (struct mpsc_port_info *)port; @@ -1674,7 +1670,6 @@ static struct uart_ops mpsc_pops = { .stop_tx = mpsc_stop_tx, .start_tx = mpsc_start_tx, .stop_rx = mpsc_stop_rx, - .enable_ms = mpsc_enable_ms, .break_ctl = mpsc_break_ctl, .startup = mpsc_startup, .shutdown = mpsc_shutdown, diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c index db0448ae59dc..1504a14ec1a6 100644 --- a/drivers/tty/serial/mrst_max3110.c +++ b/drivers/tty/serial/mrst_max3110.c @@ -698,10 +698,6 @@ static void serial_m3110_pm(struct uart_port *port, unsigned int state, { } -static void serial_m3110_enable_ms(struct uart_port *port) -{ -} - static struct uart_ops serial_m3110_ops = { .tx_empty = serial_m3110_tx_empty, .set_mctrl = serial_m3110_set_mctrl, @@ -709,7 +705,6 @@ static struct uart_ops serial_m3110_ops = { .stop_tx = serial_m3110_stop_tx, .start_tx = serial_m3110_start_tx, .stop_rx = serial_m3110_stop_rx, - .enable_ms = serial_m3110_enable_ms, .break_ctl = serial_m3110_break_ctl, .startup = serial_m3110_startup, .shutdown = serial_m3110_shutdown, diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index 72000a6d5af0..0da0b5474e98 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -125,14 +125,14 @@ static void handle_rx_dm(struct uart_port *port, unsigned int misr) port->icount.rx += count; while (count > 0) { - unsigned int c; + unsigned char buf[4]; sr = msm_read(port, UART_SR); if ((sr & UART_SR_RX_READY) == 0) { msm_port->old_snap_state -= count; break; } - c = msm_read(port, UARTDM_RF); + ioread32_rep(port->membase + UARTDM_RF, buf, 1); if (sr & UART_SR_RX_BREAK) { port->icount.brk++; if (uart_handle_break(port)) @@ -141,8 +141,7 @@ static void handle_rx_dm(struct uart_port *port, unsigned int misr) port->icount.frame++; /* TODO: handle sysrq */ - tty_insert_flip_string(tport, (char *)&c, - (count > 4) ? 4 : count); + tty_insert_flip_string(tport, buf, min(count, 4)); count -= 4; } @@ -219,6 +218,12 @@ static void handle_tx(struct uart_port *port) struct msm_port *msm_port = UART_TO_MSM(port); unsigned int tx_count, num_chars; unsigned int tf_pointer = 0; + void __iomem *tf; + + if (msm_port->is_uartdm) + tf = port->membase + UARTDM_TF; + else + tf = port->membase + UART_TF; tx_count = uart_circ_chars_pending(xmit); tx_count = min3(tx_count, (unsigned int)UART_XMIT_SIZE - xmit->tail, @@ -228,8 +233,7 @@ static void handle_tx(struct uart_port *port) if (msm_port->is_uartdm) reset_dm_count(port, tx_count + 1); - msm_write(port, port->x_char, - msm_port->is_uartdm ? UARTDM_TF : UART_TF); + iowrite8_rep(tf, &port->x_char, 1); port->icount.tx++; port->x_char = 0; } else if (tx_count && msm_port->is_uartdm) { @@ -239,7 +243,6 @@ static void handle_tx(struct uart_port *port) while (tf_pointer < tx_count) { int i; char buf[4] = { 0 }; - unsigned int *bf = (unsigned int *)&buf; if (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) break; @@ -255,7 +258,7 @@ static void handle_tx(struct uart_port *port) port->icount.tx++; } - msm_write(port, *bf, msm_port->is_uartdm ? UARTDM_TF : UART_TF); + iowrite32_rep(tf, buf, 1); xmit->tail = (xmit->tail + num_chars) & (UART_XMIT_SIZE - 1); tf_pointer += num_chars; } @@ -861,12 +864,18 @@ static void msm_console_write(struct console *co, const char *s, struct msm_port *msm_port; int num_newlines = 0; bool replaced = false; + void __iomem *tf; BUG_ON(co->index < 0 || co->index >= UART_NR); port = get_port_from_line(co->index); msm_port = UART_TO_MSM(port); + if (msm_port->is_uartdm) + tf = port->membase + UARTDM_TF; + else + tf = port->membase + UART_TF; + /* Account for newlines that will get a carriage return added */ for (i = 0; i < count; i++) if (s[i] == '\n') @@ -882,7 +891,6 @@ static void msm_console_write(struct console *co, const char *s, int j; unsigned int num_chars; char buf[4] = { 0 }; - unsigned int *bf = (unsigned int *)&buf; if (msm_port->is_uartdm) num_chars = min(count - i, (unsigned int)sizeof(buf)); @@ -907,7 +915,7 @@ static void msm_console_write(struct console *co, const char *s, while (!(msm_read(port, UART_SR) & UART_SR_TX_READY)) cpu_relax(); - msm_write(port, *bf, msm_port->is_uartdm ? UARTDM_TF : UART_TF); + iowrite32_rep(tf, buf, 1); i += num_chars; } spin_unlock(&port->lock); @@ -917,7 +925,7 @@ static int __init msm_console_setup(struct console *co, char *options) { struct uart_port *port; struct msm_port *msm_port; - int baud, flow, bits, parity; + int baud = 0, flow, bits, parity; if (unlikely(co->index >= UART_NR || co->index < 0)) return -ENXIO; @@ -1057,7 +1065,7 @@ static int msm_serial_remove(struct platform_device *pdev) return 0; } -static struct of_device_id msm_match_table[] = { +static const struct of_device_id msm_match_table[] = { { .compatible = "qcom,msm-uart" }, { .compatible = "qcom,msm-uartdm" }, {} diff --git a/drivers/tty/serial/msm_serial.h b/drivers/tty/serial/msm_serial.h index d98d45efdf86..73d3abe71e79 100644 --- a/drivers/tty/serial/msm_serial.h +++ b/drivers/tty/serial/msm_serial.h @@ -126,13 +126,13 @@ static inline void msm_write(struct uart_port *port, unsigned int val, unsigned int off) { - __raw_writel(val, port->membase + off); + writel_relaxed(val, port->membase + off); } static inline unsigned int msm_read(struct uart_port *port, unsigned int off) { - return __raw_readl(port->membase + off); + return readl_relaxed(port->membase + off); } /* diff --git a/drivers/tty/serial/mux.c b/drivers/tty/serial/mux.c index be127d0da32c..dd26511ad875 100644 --- a/drivers/tty/serial/mux.c +++ b/drivers/tty/serial/mux.c @@ -169,16 +169,6 @@ static void mux_stop_rx(struct uart_port *port) } /** - * mux_enable_ms - Enable modum status interrupts. - * @port: Ptr to the uart_port. - * - * The Serial Mux does not support this function. - */ -static void mux_enable_ms(struct uart_port *port) -{ -} - -/** * mux_break_ctl - Control the transmitssion of a break signal. * @port: Ptr to the uart_port. * @break_state: Raise/Lower the break signal. @@ -449,7 +439,6 @@ static struct uart_ops mux_pops = { .stop_tx = mux_stop_tx, .start_tx = mux_start_tx, .stop_rx = mux_stop_rx, - .enable_ms = mux_enable_ms, .break_ctl = mux_break_ctl, .startup = mux_startup, .shutdown = mux_shutdown, diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 86de4477d98a..b5c329248c81 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -815,17 +815,11 @@ static void mxs_auart_break_ctl(struct uart_port *u, int ctl) u->membase + AUART_LINECTRL_CLR); } -static void mxs_auart_enable_ms(struct uart_port *port) -{ - /* just empty */ -} - static struct uart_ops mxs_auart_ops = { .tx_empty = mxs_auart_tx_empty, .start_tx = mxs_auart_start_tx, .stop_tx = mxs_auart_stop_tx, .stop_rx = mxs_auart_stop_rx, - .enable_ms = mxs_auart_enable_ms, .break_ctl = mxs_auart_break_ctl, .set_mctrl = mxs_auart_set_mctrl, .get_mctrl = mxs_auart_get_mctrl, diff --git a/drivers/tty/serial/nwpserial.c b/drivers/tty/serial/nwpserial.c index 693bc6c2561e..c06366b6bc29 100644 --- a/drivers/tty/serial/nwpserial.c +++ b/drivers/tty/serial/nwpserial.c @@ -240,11 +240,6 @@ static void nwpserial_break_ctl(struct uart_port *port, int ctl) /* N/A */ } -static void nwpserial_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - static void nwpserial_stop_rx(struct uart_port *port) { struct nwpserial_port *up; @@ -315,7 +310,6 @@ static struct uart_ops nwpserial_pops = { .stop_tx = nwpserial_stop_tx, .start_tx = nwpserial_start_tx, .stop_rx = nwpserial_stop_rx, - .enable_ms = nwpserial_enable_ms, .break_ctl = nwpserial_break_ctl, .startup = nwpserial_startup, .shutdown = nwpserial_shutdown, diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 0cb6a8e52bd0..ea4ffc2ebb2f 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -736,9 +736,10 @@ static void pch_request_dma(struct uart_port *port) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); - dma_dev = pci_get_bus_and_slot(priv->pdev->bus->number, - PCI_DEVFN(0xa, 0)); /* Get DMA's dev - information */ + /* Get DMA's dev information */ + dma_dev = pci_get_slot(priv->pdev->bus, + PCI_DEVFN(PCI_SLOT(priv->pdev->devfn), 0)); + /* Set Tx DMA */ param = &priv->param_tx; param->dma_dev = &dma_dev->dev; @@ -1047,7 +1048,7 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv) priv->sg_tx_p, nent, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc) { - dev_err(priv->port.dev, "%s:device_prep_slave_sg Failed\n", + dev_err(priv->port.dev, "%s:dmaengine_prep_slave_sg Failed\n", __func__); return 0; } diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index c638c53cd2b6..21b7d8b86493 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -778,7 +778,7 @@ static struct uart_ops serial_pxa_pops = { .request_port = serial_pxa_request_port, .config_port = serial_pxa_config_port, .verify_port = serial_pxa_verify_port, -#ifdef CONFIG_CONSOLE_POLL +#if defined(CONFIG_CONSOLE_POLL) && defined(CONFIG_SERIAL_PXA_CONSOLE) .poll_get_char = serial_pxa_get_poll_char, .poll_put_char = serial_pxa_put_poll_char, #endif diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index c1d3ebdf3b97..4aff02d6712e 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -203,10 +203,6 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port) } } -static void s3c24xx_serial_enable_ms(struct uart_port *port) -{ -} - static inline struct s3c24xx_uart_info *s3c24xx_port_to_info(struct uart_port *port) { return to_ourport(port)->info; @@ -952,7 +948,6 @@ static struct uart_ops s3c24xx_serial_ops = { .stop_tx = s3c24xx_serial_stop_tx, .start_tx = s3c24xx_serial_start_tx, .stop_rx = s3c24xx_serial_stop_rx, - .enable_ms = s3c24xx_serial_enable_ms, .break_ctl = s3c24xx_serial_break_ctl, .startup = s3c24xx_serial_startup, .shutdown = s3c24xx_serial_shutdown, @@ -1226,8 +1221,8 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, wr_regl(port, S3C64XX_UINTSP, 0xf); } - dbg("port: map=%08x, mem=%p, irq=%d (%d,%d), clock=%u\n", - port->mapbase, port->membase, port->irq, + dbg("port: map=%pa, mem=%p, irq=%d (%d,%d), clock=%u\n", + &port->mapbase, port->membase, port->irq, ourport->rx_irq, ourport->tx_irq, port->uartclk); /* reset the fifos (and setup the uart) */ @@ -1274,12 +1269,20 @@ static inline struct s3c24xx_serial_drv_data *s3c24xx_get_driver_data( static int s3c24xx_serial_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct s3c24xx_uart_port *ourport; + int index = probe_index; int ret; - dbg("s3c24xx_serial_probe(%p) %d\n", pdev, probe_index); + if (np) { + ret = of_alias_get_id(np, "serial"); + if (ret >= 0) + index = ret; + } + + dbg("s3c24xx_serial_probe(%p) %d\n", pdev, index); - ourport = &s3c24xx_serial_ports[probe_index]; + ourport = &s3c24xx_serial_ports[index]; ourport->drv_data = s3c24xx_get_driver_data(pdev); if (!ourport->drv_data) { @@ -1293,9 +1296,15 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) dev_get_platdata(&pdev->dev) : ourport->drv_data->def_cfg; - ourport->port.fifosize = (ourport->info->fifosize) ? - ourport->info->fifosize : - ourport->drv_data->fifosize[probe_index]; + if (np) + of_property_read_u32(np, + "samsung,uart-fifosize", &ourport->port.fifosize); + + if (!ourport->port.fifosize) { + ourport->port.fifosize = (ourport->info->fifosize) ? + ourport->info->fifosize : + ourport->drv_data->fifosize[index]; + } probe_index++; @@ -1303,7 +1312,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) ret = s3c24xx_serial_init_port(ourport, pdev); if (ret < 0) - goto probe_err; + return ret; if (!s3c24xx_uart_drv.state) { ret = uart_register_driver(&s3c24xx_uart_drv); @@ -1335,9 +1344,6 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to add cpufreq notifier\n"); return 0; - - probe_err: - return ret; } static int s3c24xx_serial_remove(struct platform_device *dev) @@ -1537,8 +1543,8 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud, case S3C2410_LCON_CS7: *bits = 7; break; - default: case S3C2410_LCON_CS8: + default: *bits = 8; break; } @@ -1712,9 +1718,7 @@ static struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = { #define S3C2440_SERIAL_DRV_DATA (kernel_ulong_t)NULL #endif -#if defined(CONFIG_CPU_S3C6400) || defined(CONFIG_CPU_S3C6410) || \ - defined(CONFIG_CPU_S5P6440) || defined(CONFIG_CPU_S5P6450) || \ - defined(CONFIG_CPU_S5PC100) +#if defined(CONFIG_CPU_S3C6400) || defined(CONFIG_CPU_S3C6410) static struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = { .info = &(struct s3c24xx_uart_info) { .name = "Samsung S3C6400 UART", diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 1b6a77c4b2cb..3284c31085a7 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -991,7 +991,6 @@ static const struct uart_ops sc16is7xx_ops = { .stop_tx = sc16is7xx_stop_tx, .start_tx = sc16is7xx_start_tx, .stop_rx = sc16is7xx_stop_rx, - .enable_ms = sc16is7xx_null_void, .break_ctl = sc16is7xx_break_ctl, .startup = sc16is7xx_startup, .shutdown = sc16is7xx_shutdown, @@ -1061,7 +1060,6 @@ static int sc16is7xx_probe(struct device *dev, struct regmap *regmap, int irq, unsigned long flags) { unsigned long freq, *pfreq = dev_get_platdata(dev); - struct clk *clk; int i, ret; struct sc16is7xx_port *s; @@ -1077,14 +1075,14 @@ static int sc16is7xx_probe(struct device *dev, return -ENOMEM; } - clk = devm_clk_get(dev, NULL); - if (IS_ERR(clk)) { + s->clk = devm_clk_get(dev, NULL); + if (IS_ERR(s->clk)) { if (pfreq) freq = *pfreq; else - return PTR_ERR(clk); + return PTR_ERR(s->clk); } else { - freq = clk_get_rate(clk); + freq = clk_get_rate(s->clk); } s->regmap = regmap; diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index e84b6a3bdd18..75850f70b479 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -533,11 +533,6 @@ static unsigned int sccnxp_tx_empty(struct uart_port *port) return (val & SR_TXEMT) ? TIOCSER_TEMT : 0; } -static void sccnxp_enable_ms(struct uart_port *port) -{ - /* Do nothing */ -} - static void sccnxp_set_mctrl(struct uart_port *port, unsigned int mctrl) { struct sccnxp_port *s = dev_get_drvdata(port->dev); @@ -790,7 +785,6 @@ static const struct uart_ops sccnxp_ops = { .stop_tx = sccnxp_stop_tx, .start_tx = sccnxp_start_tx, .stop_rx = sccnxp_stop_rx, - .enable_ms = sccnxp_enable_ms, .break_ctl = sccnxp_break_ctl, .startup = sccnxp_startup, .shutdown = sccnxp_shutdown, diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index d5c2a287b7e7..53d7c31ce098 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -482,6 +482,9 @@ static void tegra_uart_stop_tx(struct uart_port *u) struct dma_tx_state state; int count; + if (tup->tx_in_progress != TEGRA_UART_TX_DMA) + return; + dmaengine_terminate_all(tup->tx_dma_chan); dmaengine_tx_status(tup->tx_dma_chan, tup->tx_cookie, &state); count = tup->tx_bytes_requested - state.residue; @@ -599,6 +602,7 @@ static void tegra_uart_handle_rx_dma(struct tegra_uart_port *tup, dmaengine_terminate_all(tup->rx_dma_chan); dmaengine_tx_status(tup->rx_dma_chan, tup->rx_cookie, &state); + async_tx_ack(tup->rx_dma_desc); count = tup->rx_bytes_requested - state.residue; /* If we are here, DMA is stopped */ diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index fbf6c5ad222f..8bb19da01639 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -243,6 +243,9 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) /* * Turn off DTR and RTS early. */ + if (uart_console(uport) && tty) + uport->cons->cflag = tty->termios.c_cflag; + if (!tty || (tty->termios.c_cflag & HUPCL)) uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); @@ -447,6 +450,7 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, return; termios = &tty->termios; + uport->ops->set_termios(uport, termios, old_termios); /* * Set flags based on termios cflag @@ -460,8 +464,6 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, clear_bit(ASYNCB_CHECK_CD, &port->flags); else set_bit(ASYNCB_CHECK_CD, &port->flags); - - uport->ops->set_termios(uport, termios, old_termios); } static inline int __uart_put_char(struct uart_port *port, @@ -1050,6 +1052,15 @@ static int uart_do_autoconfig(struct tty_struct *tty,struct uart_state *state) return ret; } +static void uart_enable_ms(struct uart_port *uport) +{ + /* + * Force modem status interrupts on + */ + if (uport->ops->enable_ms) + uport->ops->enable_ms(uport); +} + /* * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change * - mask passed in arg for lines of interest @@ -1073,11 +1084,7 @@ uart_wait_modem_status(struct uart_state *state, unsigned long arg) */ spin_lock_irq(&uport->lock); memcpy(&cprev, &uport->icount, sizeof(struct uart_icount)); - - /* - * Force modem status interrupts on - */ - uport->ops->enable_ms(uport); + uart_enable_ms(uport); spin_unlock_irq(&uport->lock); add_wait_queue(&port->delta_msr_wait, &wait); @@ -1274,6 +1281,8 @@ static void uart_set_termios(struct tty_struct *tty, } uart_change_speed(tty, state, old_termios); + /* reload cflag from termios; port driver may have overriden flags */ + cflag = tty->termios.c_cflag; /* Handle transition to B0 status */ if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD)) @@ -1360,8 +1369,8 @@ static void uart_close(struct tty_struct *tty, struct file *filp) tty_ldisc_flush(tty); tty_port_tty_set(port, NULL); - spin_lock_irqsave(&port->lock, flags); tty->closing = 0; + spin_lock_irqsave(&port->lock, flags); if (port->blocked_open) { spin_unlock_irqrestore(&port->lock, flags); @@ -1508,7 +1517,7 @@ static int uart_carrier_raised(struct tty_port *port) struct uart_port *uport = state->uart_port; int mctrl; spin_lock_irq(&uport->lock); - uport->ops->enable_ms(uport); + uart_enable_ms(uport); mctrl = uport->ops->get_mctrl(uport); spin_unlock_irq(&uport->lock); if (mctrl & TIOCM_CAR) @@ -1576,14 +1585,6 @@ static int uart_open(struct tty_struct *tty, struct file *filp) tty_port_tty_set(port, tty); /* - * If the port is in the middle of closing, bail out now. - */ - if (tty_hung_up_p(filp)) { - retval = -EAGAIN; - goto err_dec_count; - } - - /* * Start up the serial port. */ retval = uart_startup(tty, state, 0); @@ -2563,12 +2564,6 @@ static const struct attribute_group tty_dev_attr_group = { .attrs = tty_dev_attrs, }; -static const struct attribute_group *tty_dev_attr_groups[] = { - &tty_dev_attr_group, - NULL - }; - - /** * uart_add_one_port - attach a driver-defined port structure * @drv: pointer to the uart low level driver structure for this port @@ -2585,6 +2580,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) struct tty_port *port; int ret = 0; struct device *tty_dev; + int num_groups; BUG_ON(in_interrupt()); @@ -2618,12 +2614,26 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) uart_configure_port(drv, state, uport); + num_groups = 2; + if (uport->attr_group) + num_groups++; + + uport->tty_groups = kcalloc(num_groups, sizeof(*uport->tty_groups), + GFP_KERNEL); + if (!uport->tty_groups) { + ret = -ENOMEM; + goto out; + } + uport->tty_groups[0] = &tty_dev_attr_group; + if (uport->attr_group) + uport->tty_groups[1] = uport->attr_group; + /* * Register the port whether it's detected or not. This allows * setserial to be used to alter this port's parameters. */ tty_dev = tty_port_register_device_attr(port, drv->tty_driver, - uport->line, uport->dev, port, tty_dev_attr_groups); + uport->line, uport->dev, port, uport->tty_groups); if (likely(!IS_ERR(tty_dev))) { device_set_wakeup_capable(tty_dev, 1); } else { @@ -2702,6 +2712,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) */ if (uport->type != PORT_UNKNOWN) uport->ops->release_port(uport); + kfree(uport->tty_groups); /* * Indicate that there isn't a port here anymore. diff --git a/drivers/tty/serial/serial_txx9.c b/drivers/tty/serial/serial_txx9.c index ea8546092c7e..af115645c51f 100644 --- a/drivers/tty/serial/serial_txx9.c +++ b/drivers/tty/serial/serial_txx9.c @@ -142,7 +142,6 @@ struct uart_txx9_port { #define TXX9_SIFCR_RDIL_12 0x00000180 #define TXX9_SIFCR_RDIL_MAX 0x00000180 #define TXX9_SIFCR_TDIL_MASK 0x00000018 -#define TXX9_SIFCR_TDIL_MASK 0x00000018 #define TXX9_SIFCR_TDIL_1 0x00000000 #define TXX9_SIFCR_TDIL_4 0x00000001 #define TXX9_SIFCR_TDIL_8 0x00000010 @@ -244,11 +243,6 @@ static void serial_txx9_stop_rx(struct uart_port *port) up->port.read_status_mask &= ~TXX9_SIDISR_RDIS; } -static void serial_txx9_enable_ms(struct uart_port *port) -{ - /* TXX9-SIO can not control DTR... */ -} - static void serial_txx9_initialize(struct uart_port *port) { struct uart_txx9_port *up = to_uart_txx9_port(port); @@ -858,7 +852,6 @@ static struct uart_ops serial_txx9_pops = { .stop_tx = serial_txx9_stop_tx, .start_tx = serial_txx9_start_tx, .stop_rx = serial_txx9_stop_rx, - .enable_ms = serial_txx9_enable_ms, .break_ctl = serial_txx9_break_ctl, .startup = serial_txx9_startup, .shutdown = serial_txx9_shutdown, diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 88236da0ddf7..3081e46085ce 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1560,13 +1560,6 @@ static void sci_stop_rx(struct uart_port *port) serial_port_out(port, SCSCR, ctrl); } -static void sci_enable_ms(struct uart_port *port) -{ - /* - * Not supported by hardware, always a nop. - */ -} - static void sci_break_ctl(struct uart_port *port, int break_state) { struct sci_port *s = to_sci_port(port); @@ -1783,30 +1776,71 @@ static unsigned int sci_scbrr_calc(struct sci_port *s, unsigned int bps, return ((freq + 16 * bps) / (32 * bps) - 1); } +/* calculate frame length from SMR */ +static int sci_baud_calc_frame_len(unsigned int smr_val) +{ + int len = 10; + + if (smr_val & SCSMR_CHR) + len--; + if (smr_val & SCSMR_PE) + len++; + if (smr_val & SCSMR_STOP) + len++; + + return len; +} + + /* calculate sample rate, BRR, and clock select for HSCIF */ static void sci_baud_calc_hscif(unsigned int bps, unsigned long freq, int *brr, unsigned int *srr, - unsigned int *cks) + unsigned int *cks, int frame_len) { - int sr, c, br, err; + int sr, c, br, err, recv_margin; int min_err = 1000; /* 100% */ + int recv_max_margin = 0; /* Find the combination of sample rate and clock select with the smallest deviation from the desired baud rate. */ for (sr = 8; sr <= 32; sr++) { for (c = 0; c <= 3; c++) { /* integerized formulas from HSCIF documentation */ - br = freq / (sr * (1 << (2 * c + 1)) * bps) - 1; - if (br < 0 || br > 255) + br = DIV_ROUND_CLOSEST(freq, (sr * + (1 << (2 * c + 1)) * bps)) - 1; + br = clamp(br, 0, 255); + err = DIV_ROUND_CLOSEST(freq, ((br + 1) * bps * sr * + (1 << (2 * c + 1)) / 1000)) - + 1000; + if (err < 0) continue; - err = freq / ((br + 1) * bps * sr * - (1 << (2 * c + 1)) / 1000) - 1000; + + /* Calc recv margin + * M: Receive margin (%) + * N: Ratio of bit rate to clock (N = sampling rate) + * D: Clock duty (D = 0 to 1.0) + * L: Frame length (L = 9 to 12) + * F: Absolute value of clock frequency deviation + * + * M = |(0.5 - 1 / 2 * N) - ((L - 0.5) * F) - + * (|D - 0.5| / N * (1 + F))| + * NOTE: Usually, treat D for 0.5, F is 0 by this + * calculation. + */ + recv_margin = abs((500 - + DIV_ROUND_CLOSEST(1000, sr << 1)) / 10); if (min_err > err) { min_err = err; - *brr = br; - *srr = sr - 1; - *cks = c; - } + recv_max_margin = recv_margin; + } else if ((min_err == err) && + (recv_margin > recv_max_margin)) + recv_max_margin = recv_margin; + else + continue; + + *brr = br; + *srr = sr - 1; + *cks = c; } } @@ -1840,10 +1874,19 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios, { struct sci_port *s = to_sci_port(port); struct plat_sci_reg *reg; - unsigned int baud, smr_val, max_baud, cks = 0; + unsigned int baud, smr_val = 0, max_baud, cks = 0; int t = -1; unsigned int srr = 15; + if ((termios->c_cflag & CSIZE) == CS7) + smr_val |= SCSMR_CHR; + if (termios->c_cflag & PARENB) + smr_val |= SCSMR_PE; + if (termios->c_cflag & PARODD) + smr_val |= SCSMR_PE | SCSMR_ODD; + if (termios->c_cflag & CSTOPB) + smr_val |= SCSMR_STOP; + /* * earlyprintk comes here early on with port->uartclk set to zero. * the clock framework is not up and running at this point so here @@ -1857,8 +1900,9 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios, baud = uart_get_baud_rate(port, termios, old, 0, max_baud); if (likely(baud && port->uartclk)) { if (s->cfg->type == PORT_HSCIF) { + int frame_len = sci_baud_calc_frame_len(smr_val); sci_baud_calc_hscif(baud, port->uartclk, &t, &srr, - &cks); + &cks, frame_len); } else { t = sci_scbrr_calc(s, baud, port->uartclk); for (cks = 0; t >= 256 && cks <= 3; cks++) @@ -1870,16 +1914,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios, sci_reset(port); - smr_val = serial_port_in(port, SCSMR) & 3; - - if ((termios->c_cflag & CSIZE) == CS7) - smr_val |= SCSMR_CHR; - if (termios->c_cflag & PARENB) - smr_val |= SCSMR_PE; - if (termios->c_cflag & PARODD) - smr_val |= SCSMR_PE | SCSMR_ODD; - if (termios->c_cflag & CSTOPB) - smr_val |= SCSMR_STOP; + smr_val |= serial_port_in(port, SCSMR) & 3; uart_update_timeout(port, termios->c_cflag, baud); @@ -2080,7 +2115,6 @@ static struct uart_ops sci_uart_ops = { .start_tx = sci_start_tx, .stop_tx = sci_stop_tx, .stop_rx = sci_stop_rx, - .enable_ms = sci_enable_ms, .break_ctl = sci_break_ctl, .startup = sci_startup, .shutdown = sci_shutdown, diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 9b4d71cff00d..4102192687ee 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -290,7 +290,8 @@ static void sirfsoc_uart_start_tx(struct uart_port *port) if (sirfport->tx_dma_chan) sirfsoc_uart_tx_with_dma(sirfport); else { - sirfsoc_uart_pio_tx_chars(sirfport, 1); + sirfsoc_uart_pio_tx_chars(sirfport, + SIRFSOC_UART_IO_TX_REASONABLE_CNT); wr_regl(port, ureg->sirfsoc_tx_fifo_op, SIRFUART_FIFO_START); if (!sirfport->is_marco) wr_regl(port, ureg->sirfsoc_int_en_reg, diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h index 69a62ebd3afc..6a7ebf7ef130 100644 --- a/drivers/tty/serial/sirfsoc_uart.h +++ b/drivers/tty/serial/sirfsoc_uart.h @@ -449,4 +449,4 @@ struct sirfsoc_uart_port { /* I/O Mode */ #define SIRFSOC_UART_IO_RX_MAX_CNT 256 -#define SIRFSOC_UART_IO_TX_REASONABLE_CNT 6 +#define SIRFSOC_UART_IO_TX_REASONABLE_CNT 256 diff --git a/drivers/tty/serial/sn_console.c b/drivers/tty/serial/sn_console.c index f51ffdc696fd..33e94e56dcdb 100644 --- a/drivers/tty/serial/sn_console.c +++ b/drivers/tty/serial/sn_console.c @@ -275,15 +275,6 @@ static void snp_release_port(struct uart_port *port) } /** - * snp_enable_ms - Force modem status interrupts on - no-op for us - * @port: Port to operate on - we ignore - no-op function - * - */ -static void snp_enable_ms(struct uart_port *port) -{ -} - -/** * snp_shutdown - shut down the port - free irq and disable - no-op for us * @port: Port to shut down - we ignore * @@ -396,7 +387,6 @@ static struct uart_ops sn_console_ops = { .stop_tx = snp_stop_tx, .start_tx = snp_start_tx, .stop_rx = snp_stop_rx, - .enable_ms = snp_enable_ms, .break_ctl = snp_break_ctl, .startup = snp_startup, .shutdown = snp_shutdown, diff --git a/drivers/tty/serial/st-asc.c b/drivers/tty/serial/st-asc.c index f48b1cc07eea..8b2d7356611d 100644 --- a/drivers/tty/serial/st-asc.c +++ b/drivers/tty/serial/st-asc.c @@ -411,12 +411,6 @@ static void asc_stop_rx(struct uart_port *port) asc_disable_rx_interrupts(port); } -/* Force modem status interrupts on */ -static void asc_enable_ms(struct uart_port *port) -{ - /* Nothing here yet .. */ -} - /* Handle breaks - ignored by us */ static void asc_break_ctl(struct uart_port *port, int break_state) { @@ -533,12 +527,12 @@ static void asc_set_termios(struct uart_port *port, struct ktermios *termios, * ASCBaudRate = ------------------------ * inputclock * - * However to keep the maths inside 32bits we divide top and - * bottom by 64. The +1 is to avoid a divide by zero if the - * input clock rate is something unexpected. + * To keep maths inside 64bits, we divide inputclock by 16. */ - u32 counter = (baud * 16384) / ((port->uartclk / 64) + 1); - asc_out(port, ASC_BAUDRATE, counter); + u64 dividend = (u64)baud * (1 << 16); + + do_div(dividend, port->uartclk / 16); + asc_out(port, ASC_BAUDRATE, dividend); ctrl_val |= ASC_CTL_BAUDMODE; } @@ -644,7 +638,6 @@ static struct uart_ops asc_uart_ops = { .start_tx = asc_start_tx, .stop_tx = asc_stop_tx, .stop_rx = asc_stop_rx, - .enable_ms = asc_enable_ms, .break_ctl = asc_break_ctl, .startup = asc_startup, .shutdown = asc_shutdown, @@ -849,7 +842,8 @@ static int asc_console_setup(struct console *co, char *options) * this to be called during the uart port registration when the * driver gets probed and the port should be mapped at that point. */ - BUG_ON(ascport->port.mapbase == 0 || ascport->port.membase == NULL); + if (ascport->port.mapbase == 0 || ascport->port.membase == NULL) + return -ENXIO; if (options) uart_parse_options(options, &baud, &parity, &bits, &flow); diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index dc697cee248a..20521db2189f 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -285,11 +285,6 @@ static void sunhv_stop_rx(struct uart_port *port) { } -/* port->lock held by caller. */ -static void sunhv_enable_ms(struct uart_port *port) -{ -} - /* port->lock is not held. */ static void sunhv_break_ctl(struct uart_port *port, int break_state) { @@ -379,7 +374,6 @@ static struct uart_ops sunhv_pops = { .start_tx = sunhv_start_tx, .send_xchar = sunhv_send_xchar, .stop_rx = sunhv_stop_rx, - .enable_ms = sunhv_enable_ms, .break_ctl = sunhv_break_ctl, .startup = sunhv_startup, .shutdown = sunhv_shutdown, diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c index 2f57df9a71d9..bb09920ac9c7 100644 --- a/drivers/tty/serial/sunsab.c +++ b/drivers/tty/serial/sunsab.c @@ -476,12 +476,6 @@ static void sunsab_stop_rx(struct uart_port *port) writeb(up->interrupt_mask1, &up->regs->w.imr0); } -/* port->lock held by caller. */ -static void sunsab_enable_ms(struct uart_port *port) -{ - /* For now we always receive these interrupts. */ -} - /* port->lock is not held. */ static void sunsab_break_ctl(struct uart_port *port, int break_state) { @@ -810,7 +804,6 @@ static struct uart_ops sunsab_pops = { .start_tx = sunsab_start_tx, .send_xchar = sunsab_send_xchar, .stop_rx = sunsab_stop_rx, - .enable_ms = sunsab_enable_ms, .break_ctl = sunsab_break_ctl, .startup = sunsab_startup, .shutdown = sunsab_shutdown, diff --git a/drivers/tty/serial/tilegx.c b/drivers/tty/serial/tilegx.c index 613ccf09dc2a..453215f5420d 100644 --- a/drivers/tty/serial/tilegx.c +++ b/drivers/tty/serial/tilegx.c @@ -314,15 +314,6 @@ static void tilegx_stop_rx(struct uart_port *port) mutex_unlock(&tile_uart->mutex); } - -/* - * Enable modem status interrupts. - */ -static void tilegx_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - /* * Control the transmission of a break signal. */ @@ -614,7 +605,6 @@ static const struct uart_ops tilegx_ops = { .stop_tx = tilegx_stop_tx, .start_tx = tilegx_start_tx, .stop_rx = tilegx_stop_rx, - .enable_ms = tilegx_enable_ms, .break_ctl = tilegx_break_ctl, .startup = tilegx_startup, .shutdown = tilegx_shutdown, diff --git a/drivers/tty/serial/timbuart.c b/drivers/tty/serial/timbuart.c index f87097acd8ab..0d11d5032b93 100644 --- a/drivers/tty/serial/timbuart.c +++ b/drivers/tty/serial/timbuart.c @@ -244,11 +244,6 @@ static void timbuart_mctrl_check(struct uart_port *port, u32 isr, u32 *ier) *ier |= CTS_DELTA; } -static void timbuart_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - static void timbuart_break_ctl(struct uart_port *port, int ctl) { /* N/A */ @@ -405,7 +400,6 @@ static struct uart_ops timbuart_ops = { .start_tx = timbuart_start_tx, .flush_buffer = timbuart_flush_buffer, .stop_rx = timbuart_stop_rx, - .enable_ms = timbuart_enable_ms, .break_ctl = timbuart_break_ctl, .startup = timbuart_startup, .shutdown = timbuart_shutdown, diff --git a/drivers/tty/serial/uartlite.c b/drivers/tty/serial/uartlite.c index dce27f34937e..9fc22f40796e 100644 --- a/drivers/tty/serial/uartlite.c +++ b/drivers/tty/serial/uartlite.c @@ -250,11 +250,6 @@ static void ulite_stop_rx(struct uart_port *port) | ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN; } -static void ulite_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - static void ulite_break_ctl(struct uart_port *port, int ctl) { /* N/A */ @@ -395,7 +390,6 @@ static struct uart_ops ulite_ops = { .stop_tx = ulite_stop_tx, .start_tx = ulite_start_tx, .stop_rx = ulite_stop_rx, - .enable_ms = ulite_enable_ms, .break_ctl = ulite_break_ctl, .startup = ulite_startup, .shutdown = ulite_shutdown, diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index 1c52074c38df..c107a0f0e72f 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -435,16 +435,6 @@ static void qe_uart_stop_rx(struct uart_port *port) clrbits16(&qe_port->uccp->uccm, UCC_UART_UCCE_RX); } -/* - * Enable status change interrupts - * - * We don't support status change interrupts, but we need to define this - * function otherwise the kernel will panic. - */ -static void qe_uart_enable_ms(struct uart_port *port) -{ -} - /* Start or stop sending break signal * * This function controls the sending of a break signal. If break_state=1, @@ -1102,7 +1092,6 @@ static struct uart_ops qe_uart_pops = { .stop_tx = qe_uart_stop_tx, .start_tx = qe_uart_start_tx, .stop_rx = qe_uart_stop_rx, - .enable_ms = qe_uart_enable_ms, .break_ctl = qe_uart_break_ctl, .startup = qe_uart_startup, .shutdown = qe_uart_shutdown, diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 8809775e2ba3..01951d27cc03 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -918,11 +918,6 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) /* N/A */ } -static void cdns_uart_enable_ms(struct uart_port *port) -{ - /* N/A */ -} - #ifdef CONFIG_CONSOLE_POLL static int cdns_uart_poll_get_char(struct uart_port *port) { @@ -974,7 +969,6 @@ static void cdns_uart_poll_put_char(struct uart_port *port, unsigned char c) static struct uart_ops cdns_uart_ops = { .set_mctrl = cdns_uart_set_mctrl, .get_mctrl = cdns_uart_get_mctrl, - .enable_ms = cdns_uart_enable_ms, .start_tx = cdns_uart_start_tx, .stop_tx = cdns_uart_stop_tx, .stop_rx = cdns_uart_stop_rx, diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index d48e040cd8c5..b7991707ffc0 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3267,7 +3267,6 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, DECLARE_WAITQUEUE(wait, current); int retval; bool do_clocal = false; - bool extra_count = false; unsigned long flags; int dcd; struct tty_port *port = &info->port; @@ -3300,10 +3299,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, __FILE__,__LINE__, tty->driver->name, port->count ); spin_lock_irqsave(&info->irq_spinlock, flags); - if (!tty_hung_up_p(filp)) { - extra_count = true; - port->count--; - } + port->count--; spin_unlock_irqrestore(&info->irq_spinlock, flags); port->blocked_open++; @@ -3342,7 +3338,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, remove_wait_queue(&port->open_wait, &wait); /* FIXME: Racy on hangup during close wait */ - if (extra_count) + if (!tty_hung_up_p(filp)) port->count++; port->blocked_open--; @@ -3403,7 +3399,7 @@ static int mgsl_open(struct tty_struct *tty, struct file * filp) __FILE__,__LINE__,tty->driver->name, info->port.count); /* If port is closing, signal caller to try again */ - if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ + if (info->port.flags & ASYNC_CLOSING){ wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index c359a91f7346..ba1dbcdf4609 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -673,7 +673,7 @@ static int open(struct tty_struct *tty, struct file *filp) DBGINFO(("%s open, old ref count = %d\n", info->device_name, info->port.count)); /* If port is closing, signal caller to try again */ - if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ + if (info->port.flags & ASYNC_CLOSING){ wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? @@ -3273,7 +3273,6 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, DECLARE_WAITQUEUE(wait, current); int retval; bool do_clocal = false; - bool extra_count = false; unsigned long flags; int cd; struct tty_port *port = &info->port; @@ -3300,10 +3299,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, add_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&info->lock, flags); - if (!tty_hung_up_p(filp)) { - extra_count = true; - port->count--; - } + port->count--; spin_unlock_irqrestore(&info->lock, flags); port->blocked_open++; @@ -3338,7 +3334,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, set_current_state(TASK_RUNNING); remove_wait_queue(&port->open_wait, &wait); - if (extra_count) + if (!tty_hung_up_p(filp)) port->count++; port->blocked_open--; diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index 53ba8537de8d..c3f90910fed9 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -753,7 +753,7 @@ static int open(struct tty_struct *tty, struct file *filp) __FILE__,__LINE__,tty->driver->name, info->port.count); /* If port is closing, signal caller to try again */ - if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ + if (info->port.flags & ASYNC_CLOSING){ wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? @@ -3288,7 +3288,6 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, DECLARE_WAITQUEUE(wait, current); int retval; bool do_clocal = false; - bool extra_count = false; unsigned long flags; int cd; struct tty_port *port = &info->port; @@ -3322,10 +3321,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, __FILE__,__LINE__, tty->driver->name, port->count ); spin_lock_irqsave(&info->lock, flags); - if (!tty_hung_up_p(filp)) { - extra_count = true; - port->count--; - } + port->count--; spin_unlock_irqrestore(&info->lock, flags); port->blocked_open++; @@ -3362,8 +3358,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, set_current_state(TASK_RUNNING); remove_wait_queue(&port->open_wait, &wait); - - if (extra_count) + if (!tty_hung_up_p(filp)) port->count++; port->blocked_open--; diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 34110719fe03..8fbad3410c75 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -157,20 +157,6 @@ static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); /** - * alloc_tty_struct - allocate a tty object - * - * Return a new empty tty structure. The data fields have not - * been initialized in any way but has been zeroed - * - * Locking: none - */ - -struct tty_struct *alloc_tty_struct(void) -{ - return kzalloc(sizeof(struct tty_struct), GFP_KERNEL); -} - -/** * free_tty_struct - free a disused tty * @tty: tty struct to free * @@ -688,7 +674,7 @@ static void __tty_hangup(struct tty_struct *tty, int exit_session) for (n = 0; n < closecount; n++) tty->ops->close(tty, cons_filp); } else if (tty->ops->hangup) - (tty->ops->hangup)(tty); + tty->ops->hangup(tty); /* * We don't want to have driver/ldisc interactions beyond * the ones we did here. The driver layer expects no @@ -1455,12 +1441,11 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) if (!try_module_get(driver->owner)) return ERR_PTR(-ENODEV); - tty = alloc_tty_struct(); + tty = alloc_tty_struct(driver, idx); if (!tty) { retval = -ENOMEM; goto err_module_put; } - initialize_tty_struct(tty, driver, idx); tty_lock(tty); retval = tty_driver_install_tty(driver, tty); @@ -3003,19 +2988,21 @@ static struct device *tty_get_device(struct tty_struct *tty) /** - * initialize_tty_struct - * @tty: tty to initialize + * alloc_tty_struct * - * This subroutine initializes a tty structure that has been newly - * allocated. + * This subroutine allocates and initializes a tty structure. * - * Locking: none - tty in question must not be exposed at this point + * Locking: none - tty in question is not exposed at this point */ -void initialize_tty_struct(struct tty_struct *tty, - struct tty_driver *driver, int idx) +struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx) { - memset(tty, 0, sizeof(struct tty_struct)); + struct tty_struct *tty; + + tty = kzalloc(sizeof(*tty), GFP_KERNEL); + if (!tty) + return NULL; + kref_init(&tty->kref); tty->magic = TTY_MAGIC; tty_ldisc_init(tty); @@ -3039,6 +3026,8 @@ void initialize_tty_struct(struct tty_struct *tty, tty->index = idx; tty_line_name(driver, idx, tty->name); tty->dev = tty_get_device(tty); + + return tty; } /** diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 3f746c8eb0dd..1b9335796da4 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -227,6 +227,8 @@ out: * * Perform port level tty hangup flag and count changes. Drop the tty * reference. + * + * Caller holds tty lock. */ void tty_port_hangup(struct tty_port *port) @@ -348,6 +350,11 @@ EXPORT_SYMBOL(tty_port_lower_dtr_rts); * do carrier detect and the dtr_rts method if it supports software * management of these lines. Note that the dtr/rts raise is done each * iteration as a hangup may have previously dropped them while we wait. + * + * Caller holds tty lock. + * + * NB: May drop and reacquire tty lock when blocking, so tty and tty_port + * may have changed state (eg., may have been hung up). */ int tty_port_block_til_ready(struct tty_port *port, @@ -358,7 +365,7 @@ int tty_port_block_til_ready(struct tty_port *port, DEFINE_WAIT(wait); /* block if port is in the process of being closed */ - if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { + if (port->flags & ASYNC_CLOSING) { wait_event_interruptible_tty(tty, port->close_wait, !(port->flags & ASYNC_CLOSING)); if (port->flags & ASYNC_HUP_NOTIFY) @@ -392,8 +399,7 @@ int tty_port_block_til_ready(struct tty_port *port, /* The port lock protects the port counts */ spin_lock_irqsave(&port->lock, flags); - if (!tty_hung_up_p(filp)) - port->count--; + port->count--; port->blocked_open++; spin_unlock_irqrestore(&port->lock, flags); @@ -458,6 +464,10 @@ static void tty_port_drain_delay(struct tty_port *port, struct tty_struct *tty) schedule_timeout_interruptible(timeout); } +/* Caller holds tty lock. + * NB: may drop and reacquire tty lock (in tty_wait_until_sent_from_close()) + * so tty and tty port may have changed state (but not hung up or reopened). + */ int tty_port_close_start(struct tty_port *port, struct tty_struct *tty, struct file *filp) { @@ -486,9 +496,10 @@ int tty_port_close_start(struct tty_port *port, return 0; } set_bit(ASYNCB_CLOSING, &port->flags); - tty->closing = 1; spin_unlock_irqrestore(&port->lock, flags); + tty->closing = 1; + if (test_bit(ASYNCB_INITIALIZED, &port->flags)) { /* Don't block on a stalled port, just pull the chain */ if (tty->flow_stopped) @@ -506,13 +517,15 @@ int tty_port_close_start(struct tty_port *port, } EXPORT_SYMBOL(tty_port_close_start); +/* Caller holds tty lock */ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty) { unsigned long flags; - spin_lock_irqsave(&port->lock, flags); tty->closing = 0; + spin_lock_irqsave(&port->lock, flags); + if (port->blocked_open) { spin_unlock_irqrestore(&port->lock, flags); if (port->close_delay) { @@ -528,6 +541,15 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty) } EXPORT_SYMBOL(tty_port_close_end); +/** + * tty_port_close + * + * Caller holds tty lock + * + * NB: may drop and reacquire tty lock (in tty_port_close_start()-> + * tty_wait_until_sent_from_close()) so tty and tty_port may have changed + * state (but not hung up or reopened). + */ void tty_port_close(struct tty_port *port, struct tty_struct *tty, struct file *filp) { @@ -558,12 +580,19 @@ int tty_port_install(struct tty_port *port, struct tty_driver *driver, } EXPORT_SYMBOL_GPL(tty_port_install); +/** + * tty_port_open + * + * Caller holds tty lock. + * + * NB: may drop and reacquire tty lock (in tty_port_block_til_ready()) so + * tty and tty_port may have changed state (eg., may be hung up now) + */ int tty_port_open(struct tty_port *port, struct tty_struct *tty, struct file *filp) { spin_lock_irq(&port->lock); - if (!tty_hung_up_p(filp)) - ++port->count; + ++port->count; spin_unlock_irq(&port->lock); tty_port_tty_set(port, tty); |